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Make PERL_MEM_LOG more portable.
[perl5.git] / pp_hot.c
CommitLineData
a0d0e21e
LW
1/* pp_hot.c
2 *
4bb101f2 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
241d1a3b 4 * 2000, 2001, 2002, 2003, 2004, 2005, by Larry Wall and others
a0d0e21e
LW
5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
9 */
10
11/*
12 * Then he heard Merry change the note, and up went the Horn-cry of Buckland,
13 * shaking the air.
14 *
15 * Awake! Awake! Fear, Fire, Foes! Awake!
16 * Fire, Foes! Awake!
17 */
18
166f8a29
DM
19/* This file contains 'hot' pp ("push/pop") functions that
20 * execute the opcodes that make up a perl program. A typical pp function
21 * expects to find its arguments on the stack, and usually pushes its
22 * results onto the stack, hence the 'pp' terminology. Each OP structure
23 * contains a pointer to the relevant pp_foo() function.
24 *
25 * By 'hot', we mean common ops whose execution speed is critical.
26 * By gathering them together into a single file, we encourage
27 * CPU cache hits on hot code. Also it could be taken as a warning not to
28 * change any code in this file unless you're sure it won't affect
29 * performance.
30 */
31
a0d0e21e 32#include "EXTERN.h"
864dbfa3 33#define PERL_IN_PP_HOT_C
a0d0e21e
LW
34#include "perl.h"
35
36/* Hot code. */
37
38PP(pp_const)
39{
39644a26 40 dSP;
1d7c1841 41 XPUSHs(cSVOP_sv);
a0d0e21e
LW
42 RETURN;
43}
44
45PP(pp_nextstate)
46{
533c011a 47 PL_curcop = (COP*)PL_op;
a0d0e21e 48 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 49 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
50 FREETMPS;
51 return NORMAL;
52}
53
54PP(pp_gvsv)
55{
39644a26 56 dSP;
924508f0 57 EXTEND(SP,1);
533c011a 58 if (PL_op->op_private & OPpLVAL_INTRO)
1d7c1841 59 PUSHs(save_scalar(cGVOP_gv));
a0d0e21e 60 else
c69033f2 61 PUSHs(GvSVn(cGVOP_gv));
a0d0e21e
LW
62 RETURN;
63}
64
65PP(pp_null)
66{
67 return NORMAL;
68}
69
7399586d
HS
70PP(pp_setstate)
71{
72 PL_curcop = (COP*)PL_op;
73 return NORMAL;
74}
75
a0d0e21e
LW
76PP(pp_pushmark)
77{
3280af22 78 PUSHMARK(PL_stack_sp);
a0d0e21e
LW
79 return NORMAL;
80}
81
82PP(pp_stringify)
83{
39644a26 84 dSP; dTARGET;
6050d10e 85 sv_copypv(TARG,TOPs);
a0d0e21e
LW
86 SETTARG;
87 RETURN;
88}
89
90PP(pp_gv)
91{
39644a26 92 dSP;
1d7c1841 93 XPUSHs((SV*)cGVOP_gv);
a0d0e21e
LW
94 RETURN;
95}
96
97PP(pp_and)
98{
39644a26 99 dSP;
a0d0e21e
LW
100 if (!SvTRUE(TOPs))
101 RETURN;
102 else {
103 --SP;
104 RETURNOP(cLOGOP->op_other);
105 }
106}
107
108PP(pp_sassign)
109{
39644a26 110 dSP; dPOPTOPssrl;
748a9306 111
533c011a 112 if (PL_op->op_private & OPpASSIGN_BACKWARDS) {
a0d0e21e
LW
113 SV *temp;
114 temp = left; left = right; right = temp;
115 }
3280af22 116 if (PL_tainting && PL_tainted && !SvTAINTED(left))
a0d0e21e 117 TAINT_NOT;
54310121 118 SvSetMagicSV(right, left);
a0d0e21e
LW
119 SETs(right);
120 RETURN;
121}
122
123PP(pp_cond_expr)
124{
39644a26 125 dSP;
a0d0e21e 126 if (SvTRUEx(POPs))
1a67a97c 127 RETURNOP(cLOGOP->op_other);
a0d0e21e 128 else
1a67a97c 129 RETURNOP(cLOGOP->op_next);
a0d0e21e
LW
130}
131
132PP(pp_unstack)
133{
134 I32 oldsave;
135 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 136 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e 137 FREETMPS;
3280af22 138 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW
139 LEAVE_SCOPE(oldsave);
140 return NORMAL;
141}
142
a0d0e21e
LW
143PP(pp_concat)
144{
39644a26 145 dSP; dATARGET; tryAMAGICbin(concat,opASSIGN);
748a9306
LW
146 {
147 dPOPTOPssrl;
8d6d96c1
HS
148 bool lbyte;
149 STRLEN rlen;
5c144d81 150 const char *rpv = SvPV_const(right, rlen); /* mg_get(right) happens here */
a9c4fd4e
AL
151 const bool rbyte = !DO_UTF8(right);
152 bool rcopied = FALSE;
8d6d96c1
HS
153
154 if (TARG == right && right != left) {
155 right = sv_2mortal(newSVpvn(rpv, rlen));
349d4f2f 156 rpv = SvPV_const(right, rlen); /* no point setting UTF-8 here */
db79b45b 157 rcopied = TRUE;
8d6d96c1 158 }
7889fe52 159
8d6d96c1 160 if (TARG != left) {
a9c4fd4e 161 STRLEN llen;
5c144d81 162 const char* const lpv = SvPV_const(left, llen); /* mg_get(left) may happen here */
90f5826e 163 lbyte = !DO_UTF8(left);
8d6d96c1
HS
164 sv_setpvn(TARG, lpv, llen);
165 if (!lbyte)
166 SvUTF8_on(TARG);
167 else
168 SvUTF8_off(TARG);
169 }
170 else { /* TARG == left */
a9c4fd4e 171 STRLEN llen;
8d6d96c1
HS
172 if (SvGMAGICAL(left))
173 mg_get(left); /* or mg_get(left) may happen here */
174 if (!SvOK(TARG))
c69006e4 175 sv_setpvn(left, "", 0);
10516c54 176 (void)SvPV_nomg_const(left, llen); /* Needed to set UTF8 flag */
90f5826e
ST
177 lbyte = !DO_UTF8(left);
178 if (IN_BYTES)
179 SvUTF8_off(TARG);
8d6d96c1 180 }
a12c0f56 181
8d6d96c1
HS
182 if (lbyte != rbyte) {
183 if (lbyte)
184 sv_utf8_upgrade_nomg(TARG);
185 else {
db79b45b
JH
186 if (!rcopied)
187 right = sv_2mortal(newSVpvn(rpv, rlen));
8d6d96c1 188 sv_utf8_upgrade_nomg(right);
349d4f2f 189 rpv = SvPV_const(right, rlen);
69b47968 190 }
a0d0e21e 191 }
8d6d96c1 192 sv_catpvn_nomg(TARG, rpv, rlen);
43ebc500 193
a0d0e21e
LW
194 SETTARG;
195 RETURN;
748a9306 196 }
a0d0e21e
LW
197}
198
199PP(pp_padsv)
200{
39644a26 201 dSP; dTARGET;
a0d0e21e 202 XPUSHs(TARG);
533c011a
NIS
203 if (PL_op->op_flags & OPf_MOD) {
204 if (PL_op->op_private & OPpLVAL_INTRO)
dd2155a4 205 SAVECLEARSV(PAD_SVl(PL_op->op_targ));
a62b51b8 206 if (PL_op->op_private & OPpDEREF) {
8ec5e241 207 PUTBACK;
dd2155a4 208 vivify_ref(PAD_SVl(PL_op->op_targ), PL_op->op_private & OPpDEREF);
8ec5e241
NIS
209 SPAGAIN;
210 }
4633a7c4 211 }
a0d0e21e
LW
212 RETURN;
213}
214
215PP(pp_readline)
216{
f5284f61 217 tryAMAGICunTARGET(iter, 0);
3280af22 218 PL_last_in_gv = (GV*)(*PL_stack_sp--);
8efb3254 219 if (SvTYPE(PL_last_in_gv) != SVt_PVGV) {
1c846c1f 220 if (SvROK(PL_last_in_gv) && SvTYPE(SvRV(PL_last_in_gv)) == SVt_PVGV)
f5284f61 221 PL_last_in_gv = (GV*)SvRV(PL_last_in_gv);
8efb3254 222 else {
f5284f61
IZ
223 dSP;
224 XPUSHs((SV*)PL_last_in_gv);
225 PUTBACK;
cea2e8a9 226 pp_rv2gv();
f5284f61 227 PL_last_in_gv = (GV*)(*PL_stack_sp--);
f5284f61
IZ
228 }
229 }
a0d0e21e
LW
230 return do_readline();
231}
232
233PP(pp_eq)
234{
39644a26 235 dSP; tryAMAGICbinSET(eq,0);
4c9fe80f 236#ifndef NV_PRESERVES_UV
0bdaccee 237 if (SvROK(TOPs) && !SvAMAGIC(TOPs) && SvROK(TOPm1s) && !SvAMAGIC(TOPm1s)) {
e61d22ef
NC
238 SP--;
239 SETs(boolSV(SvRV(TOPs) == SvRV(TOPp1s)));
4c9fe80f
AS
240 RETURN;
241 }
242#endif
28e5dec8
JH
243#ifdef PERL_PRESERVE_IVUV
244 SvIV_please(TOPs);
245 if (SvIOK(TOPs)) {
4c9fe80f
AS
246 /* Unless the left argument is integer in range we are going
247 to have to use NV maths. Hence only attempt to coerce the
248 right argument if we know the left is integer. */
28e5dec8
JH
249 SvIV_please(TOPm1s);
250 if (SvIOK(TOPm1s)) {
251 bool auvok = SvUOK(TOPm1s);
252 bool buvok = SvUOK(TOPs);
a12c0f56 253
1605159e
NC
254 if (auvok == buvok) { /* ## IV == IV or UV == UV ## */
255 /* Casting IV to UV before comparison isn't going to matter
256 on 2s complement. On 1s complement or sign&magnitude
257 (if we have any of them) it could to make negative zero
258 differ from normal zero. As I understand it. (Need to
259 check - is negative zero implementation defined behaviour
260 anyway?). NWC */
261 UV buv = SvUVX(POPs);
262 UV auv = SvUVX(TOPs);
28e5dec8 263
28e5dec8
JH
264 SETs(boolSV(auv == buv));
265 RETURN;
266 }
267 { /* ## Mixed IV,UV ## */
1605159e 268 SV *ivp, *uvp;
28e5dec8 269 IV iv;
28e5dec8 270
1605159e 271 /* == is commutative so doesn't matter which is left or right */
28e5dec8 272 if (auvok) {
1605159e
NC
273 /* top of stack (b) is the iv */
274 ivp = *SP;
275 uvp = *--SP;
276 } else {
277 uvp = *SP;
278 ivp = *--SP;
279 }
280 iv = SvIVX(ivp);
281 if (iv < 0) {
282 /* As uv is a UV, it's >0, so it cannot be == */
283 SETs(&PL_sv_no);
284 RETURN;
285 }
28e5dec8 286 /* we know iv is >= 0 */
1605159e 287 SETs(boolSV((UV)iv == SvUVX(uvp)));
28e5dec8
JH
288 RETURN;
289 }
290 }
291 }
292#endif
a0d0e21e
LW
293 {
294 dPOPnv;
54310121 295 SETs(boolSV(TOPn == value));
a0d0e21e
LW
296 RETURN;
297 }
298}
299
300PP(pp_preinc)
301{
39644a26 302 dSP;
f39684df 303 if (SvTYPE(TOPs) >= SVt_PVGV && SvTYPE(TOPs) != SVt_PVLV)
d470f89e 304 DIE(aTHX_ PL_no_modify);
3510b4a1
NC
305 if (!SvREADONLY(TOPs) && SvIOK_notUV(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs)
306 && SvIVX(TOPs) != IV_MAX)
55497cff 307 {
45977657 308 SvIV_set(TOPs, SvIVX(TOPs) + 1);
55497cff 309 SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK);
748a9306 310 }
28e5dec8 311 else /* Do all the PERL_PRESERVE_IVUV conditionals in sv_inc */
748a9306 312 sv_inc(TOPs);
a0d0e21e
LW
313 SvSETMAGIC(TOPs);
314 return NORMAL;
315}
316
317PP(pp_or)
318{
39644a26 319 dSP;
a0d0e21e
LW
320 if (SvTRUE(TOPs))
321 RETURN;
322 else {
323 --SP;
324 RETURNOP(cLOGOP->op_other);
325 }
326}
327
c963b151
BD
328PP(pp_dor)
329{
330 /* Most of this is lifted straight from pp_defined */
331 dSP;
a3b680e6 332 register SV* const sv = TOPs;
c963b151 333
c963b151
BD
334 if (!sv || !SvANY(sv)) {
335 --SP;
336 RETURNOP(cLOGOP->op_other);
337 }
338
339 switch (SvTYPE(sv)) {
340 case SVt_PVAV:
341 if (AvMAX(sv) >= 0 || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
342 RETURN;
343 break;
344 case SVt_PVHV:
345 if (HvARRAY(sv) || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
346 RETURN;
347 break;
348 case SVt_PVCV:
349 if (CvROOT(sv) || CvXSUB(sv))
350 RETURN;
351 break;
352 default:
353 if (SvGMAGICAL(sv))
354 mg_get(sv);
355 if (SvOK(sv))
356 RETURN;
357 }
358
359 --SP;
360 RETURNOP(cLOGOP->op_other);
361}
362
a0d0e21e
LW
363PP(pp_add)
364{
39644a26 365 dSP; dATARGET; bool useleft; tryAMAGICbin(add,opASSIGN);
28e5dec8
JH
366 useleft = USE_LEFT(TOPm1s);
367#ifdef PERL_PRESERVE_IVUV
368 /* We must see if we can perform the addition with integers if possible,
369 as the integer code detects overflow while the NV code doesn't.
370 If either argument hasn't had a numeric conversion yet attempt to get
371 the IV. It's important to do this now, rather than just assuming that
372 it's not IOK as a PV of "9223372036854775806" may not take well to NV
373 addition, and an SV which is NOK, NV=6.0 ought to be coerced to
374 integer in case the second argument is IV=9223372036854775806
375 We can (now) rely on sv_2iv to do the right thing, only setting the
376 public IOK flag if the value in the NV (or PV) slot is truly integer.
377
378 A side effect is that this also aggressively prefers integer maths over
7dca457a
NC
379 fp maths for integer values.
380
a00b5bd3 381 How to detect overflow?
7dca457a
NC
382
383 C 99 section 6.2.6.1 says
384
385 The range of nonnegative values of a signed integer type is a subrange
386 of the corresponding unsigned integer type, and the representation of
387 the same value in each type is the same. A computation involving
388 unsigned operands can never overflow, because a result that cannot be
389 represented by the resulting unsigned integer type is reduced modulo
390 the number that is one greater than the largest value that can be
391 represented by the resulting type.
392
393 (the 9th paragraph)
394
395 which I read as "unsigned ints wrap."
396
397 signed integer overflow seems to be classed as "exception condition"
398
399 If an exceptional condition occurs during the evaluation of an
400 expression (that is, if the result is not mathematically defined or not
401 in the range of representable values for its type), the behavior is
402 undefined.
403
404 (6.5, the 5th paragraph)
405
406 I had assumed that on 2s complement machines signed arithmetic would
407 wrap, hence coded pp_add and pp_subtract on the assumption that
408 everything perl builds on would be happy. After much wailing and
409 gnashing of teeth it would seem that irix64 knows its ANSI spec well,
410 knows that it doesn't need to, and doesn't. Bah. Anyway, the all-
411 unsigned code below is actually shorter than the old code. :-)
412 */
413
28e5dec8
JH
414 SvIV_please(TOPs);
415 if (SvIOK(TOPs)) {
416 /* Unless the left argument is integer in range we are going to have to
417 use NV maths. Hence only attempt to coerce the right argument if
418 we know the left is integer. */
9c5ffd7c
JH
419 register UV auv = 0;
420 bool auvok = FALSE;
7dca457a
NC
421 bool a_valid = 0;
422
28e5dec8 423 if (!useleft) {
7dca457a
NC
424 auv = 0;
425 a_valid = auvok = 1;
426 /* left operand is undef, treat as zero. + 0 is identity,
427 Could SETi or SETu right now, but space optimise by not adding
428 lots of code to speed up what is probably a rarish case. */
429 } else {
430 /* Left operand is defined, so is it IV? */
431 SvIV_please(TOPm1s);
432 if (SvIOK(TOPm1s)) {
433 if ((auvok = SvUOK(TOPm1s)))
434 auv = SvUVX(TOPm1s);
435 else {
a3b680e6 436 register const IV aiv = SvIVX(TOPm1s);
7dca457a
NC
437 if (aiv >= 0) {
438 auv = aiv;
439 auvok = 1; /* Now acting as a sign flag. */
440 } else { /* 2s complement assumption for IV_MIN */
441 auv = (UV)-aiv;
442 }
443 }
444 a_valid = 1;
28e5dec8
JH
445 }
446 }
7dca457a
NC
447 if (a_valid) {
448 bool result_good = 0;
449 UV result;
450 register UV buv;
28e5dec8 451 bool buvok = SvUOK(TOPs);
a00b5bd3 452
7dca457a
NC
453 if (buvok)
454 buv = SvUVX(TOPs);
455 else {
a3b680e6 456 register const IV biv = SvIVX(TOPs);
7dca457a
NC
457 if (biv >= 0) {
458 buv = biv;
459 buvok = 1;
460 } else
461 buv = (UV)-biv;
462 }
463 /* ?uvok if value is >= 0. basically, flagged as UV if it's +ve,
602f51c4 464 else "IV" now, independent of how it came in.
7dca457a
NC
465 if a, b represents positive, A, B negative, a maps to -A etc
466 a + b => (a + b)
467 A + b => -(a - b)
468 a + B => (a - b)
469 A + B => -(a + b)
470 all UV maths. negate result if A negative.
471 add if signs same, subtract if signs differ. */
472
473 if (auvok ^ buvok) {
474 /* Signs differ. */
475 if (auv >= buv) {
476 result = auv - buv;
477 /* Must get smaller */
478 if (result <= auv)
479 result_good = 1;
480 } else {
481 result = buv - auv;
482 if (result <= buv) {
483 /* result really should be -(auv-buv). as its negation
484 of true value, need to swap our result flag */
485 auvok = !auvok;
486 result_good = 1;
28e5dec8
JH
487 }
488 }
7dca457a
NC
489 } else {
490 /* Signs same */
491 result = auv + buv;
492 if (result >= auv)
493 result_good = 1;
494 }
495 if (result_good) {
496 SP--;
497 if (auvok)
28e5dec8 498 SETu( result );
7dca457a
NC
499 else {
500 /* Negate result */
501 if (result <= (UV)IV_MIN)
502 SETi( -(IV)result );
503 else {
504 /* result valid, but out of range for IV. */
505 SETn( -(NV)result );
28e5dec8
JH
506 }
507 }
7dca457a
NC
508 RETURN;
509 } /* Overflow, drop through to NVs. */
28e5dec8
JH
510 }
511 }
512#endif
a0d0e21e 513 {
28e5dec8
JH
514 dPOPnv;
515 if (!useleft) {
516 /* left operand is undef, treat as zero. + 0.0 is identity. */
517 SETn(value);
518 RETURN;
519 }
520 SETn( value + TOPn );
521 RETURN;
a0d0e21e
LW
522 }
523}
524
525PP(pp_aelemfast)
526{
39644a26 527 dSP;
6a077020
DM
528 AV *av = PL_op->op_flags & OPf_SPECIAL ?
529 (AV*)PAD_SV(PL_op->op_targ) : GvAV(cGVOP_gv);
a3b680e6 530 const U32 lval = PL_op->op_flags & OPf_MOD;
533c011a 531 SV** svp = av_fetch(av, PL_op->op_private, lval);
3280af22 532 SV *sv = (svp ? *svp : &PL_sv_undef);
6ff81951 533 EXTEND(SP, 1);
be6c24e0
GS
534 if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */
535 sv = sv_mortalcopy(sv);
536 PUSHs(sv);
a0d0e21e
LW
537 RETURN;
538}
539
540PP(pp_join)
541{
39644a26 542 dSP; dMARK; dTARGET;
a0d0e21e
LW
543 MARK++;
544 do_join(TARG, *MARK, MARK, SP);
545 SP = MARK;
546 SETs(TARG);
547 RETURN;
548}
549
550PP(pp_pushre)
551{
39644a26 552 dSP;
44a8e56a
PP
553#ifdef DEBUGGING
554 /*
555 * We ass_u_me that LvTARGOFF() comes first, and that two STRLENs
556 * will be enough to hold an OP*.
557 */
558 SV* sv = sv_newmortal();
559 sv_upgrade(sv, SVt_PVLV);
560 LvTYPE(sv) = '/';
533c011a 561 Copy(&PL_op, &LvTARGOFF(sv), 1, OP*);
44a8e56a
PP
562 XPUSHs(sv);
563#else
6b88bc9c 564 XPUSHs((SV*)PL_op);
44a8e56a 565#endif
a0d0e21e
LW
566 RETURN;
567}
568
569/* Oversized hot code. */
570
571PP(pp_print)
572{
27da23d5 573 dVAR; dSP; dMARK; dORIGMARK;
a0d0e21e
LW
574 GV *gv;
575 IO *io;
760ac839 576 register PerlIO *fp;
236988e4 577 MAGIC *mg;
a0d0e21e 578
533c011a 579 if (PL_op->op_flags & OPf_STACKED)
a0d0e21e
LW
580 gv = (GV*)*++MARK;
581 else
3280af22 582 gv = PL_defoutgv;
5b468f54
AMS
583
584 if (gv && (io = GvIO(gv))
585 && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
586 {
01bb7c6d 587 had_magic:
68dc0745 588 if (MARK == ORIGMARK) {
1c846c1f 589 /* If using default handle then we need to make space to
a60c0954
NIS
590 * pass object as 1st arg, so move other args up ...
591 */
4352c267 592 MEXTEND(SP, 1);
68dc0745
PP
593 ++MARK;
594 Move(MARK, MARK + 1, (SP - MARK) + 1, SV*);
595 ++SP;
596 }
597 PUSHMARK(MARK - 1);
5b468f54 598 *MARK = SvTIED_obj((SV*)io, mg);
68dc0745 599 PUTBACK;
236988e4 600 ENTER;
864dbfa3 601 call_method("PRINT", G_SCALAR);
236988e4
PP
602 LEAVE;
603 SPAGAIN;
68dc0745
PP
604 MARK = ORIGMARK + 1;
605 *MARK = *SP;
606 SP = MARK;
236988e4
PP
607 RETURN;
608 }
a0d0e21e 609 if (!(io = GvIO(gv))) {
5b468f54
AMS
610 if ((GvEGV(gv)) && (io = GvIO(GvEGV(gv)))
611 && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
01bb7c6d 612 goto had_magic;
2dd78f96
JH
613 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
614 report_evil_fh(gv, io, PL_op->op_type);
93189314 615 SETERRNO(EBADF,RMS_IFI);
a0d0e21e
LW
616 goto just_say_no;
617 }
618 else if (!(fp = IoOFP(io))) {
599cee73 619 if (ckWARN2(WARN_CLOSED, WARN_IO)) {
4c80c0b2
NC
620 if (IoIFP(io))
621 report_evil_fh(gv, io, OP_phoney_INPUT_ONLY);
2dd78f96 622 else if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
bc37a18f 623 report_evil_fh(gv, io, PL_op->op_type);
a0d0e21e 624 }
93189314 625 SETERRNO(EBADF,IoIFP(io)?RMS_FAC:RMS_IFI);
a0d0e21e
LW
626 goto just_say_no;
627 }
628 else {
629 MARK++;
7889fe52 630 if (PL_ofs_sv && SvOK(PL_ofs_sv)) {
a0d0e21e
LW
631 while (MARK <= SP) {
632 if (!do_print(*MARK, fp))
633 break;
634 MARK++;
635 if (MARK <= SP) {
7889fe52 636 if (!do_print(PL_ofs_sv, fp)) { /* $, */
a0d0e21e
LW
637 MARK--;
638 break;
639 }
640 }
641 }
642 }
643 else {
644 while (MARK <= SP) {
645 if (!do_print(*MARK, fp))
646 break;
647 MARK++;
648 }
649 }
650 if (MARK <= SP)
651 goto just_say_no;
652 else {
7889fe52
NIS
653 if (PL_ors_sv && SvOK(PL_ors_sv))
654 if (!do_print(PL_ors_sv, fp)) /* $\ */
a0d0e21e
LW
655 goto just_say_no;
656
657 if (IoFLAGS(io) & IOf_FLUSH)
760ac839 658 if (PerlIO_flush(fp) == EOF)
a0d0e21e
LW
659 goto just_say_no;
660 }
661 }
662 SP = ORIGMARK;
3280af22 663 PUSHs(&PL_sv_yes);
a0d0e21e
LW
664 RETURN;
665
666 just_say_no:
667 SP = ORIGMARK;
3280af22 668 PUSHs(&PL_sv_undef);
a0d0e21e
LW
669 RETURN;
670}
671
672PP(pp_rv2av)
673{
39644a26 674 dSP; dTOPss;
a0d0e21e
LW
675 AV *av;
676
677 if (SvROK(sv)) {
678 wasref:
f5284f61
IZ
679 tryAMAGICunDEREF(to_av);
680
a0d0e21e
LW
681 av = (AV*)SvRV(sv);
682 if (SvTYPE(av) != SVt_PVAV)
cea2e8a9 683 DIE(aTHX_ "Not an ARRAY reference");
533c011a 684 if (PL_op->op_flags & OPf_REF) {
f5284f61 685 SETs((SV*)av);
a0d0e21e
LW
686 RETURN;
687 }
78f9721b
SM
688 else if (LVRET) {
689 if (GIMME == G_SCALAR)
690 Perl_croak(aTHX_ "Can't return array to lvalue scalar context");
691 SETs((SV*)av);
692 RETURN;
693 }
82d03984
RGS
694 else if (PL_op->op_flags & OPf_MOD
695 && PL_op->op_private & OPpLVAL_INTRO)
696 Perl_croak(aTHX_ PL_no_localize_ref);
a0d0e21e
LW
697 }
698 else {
699 if (SvTYPE(sv) == SVt_PVAV) {
700 av = (AV*)sv;
533c011a 701 if (PL_op->op_flags & OPf_REF) {
f5284f61 702 SETs((SV*)av);
a0d0e21e
LW
703 RETURN;
704 }
78f9721b
SM
705 else if (LVRET) {
706 if (GIMME == G_SCALAR)
707 Perl_croak(aTHX_ "Can't return array to lvalue"
708 " scalar context");
709 SETs((SV*)av);
710 RETURN;
711 }
a0d0e21e
LW
712 }
713 else {
67955e0c 714 GV *gv;
1c846c1f 715
a0d0e21e
LW
716 if (SvTYPE(sv) != SVt_PVGV) {
717 if (SvGMAGICAL(sv)) {
718 mg_get(sv);
719 if (SvROK(sv))
720 goto wasref;
721 }
722 if (!SvOK(sv)) {
533c011a
NIS
723 if (PL_op->op_flags & OPf_REF ||
724 PL_op->op_private & HINT_STRICT_REFS)
cea2e8a9 725 DIE(aTHX_ PL_no_usym, "an ARRAY");
599cee73 726 if (ckWARN(WARN_UNINITIALIZED))
29489e7c 727 report_uninit(sv);
f5284f61 728 if (GIMME == G_ARRAY) {
c2444246 729 (void)POPs;
4633a7c4 730 RETURN;
f5284f61
IZ
731 }
732 RETSETUNDEF;
a0d0e21e 733 }
35cd451c
GS
734 if ((PL_op->op_flags & OPf_SPECIAL) &&
735 !(PL_op->op_flags & OPf_MOD))
736 {
7a5fd60d 737 gv = (GV*)gv_fetchsv(sv, FALSE, SVt_PVAV);
c9d5ac95 738 if (!gv
7a5fd60d
NC
739 && (!is_gv_magical_sv(sv,0)
740 || !(gv = (GV*)gv_fetchsv(sv, TRUE, SVt_PVAV))))
c9d5ac95 741 {
35cd451c 742 RETSETUNDEF;
c9d5ac95 743 }
35cd451c
GS
744 }
745 else {
746 if (PL_op->op_private & HINT_STRICT_REFS)
7a5fd60d
NC
747 DIE(aTHX_ PL_no_symref_sv, sv, "an ARRAY");
748 gv = (GV*)gv_fetchsv(sv, TRUE, SVt_PVAV);
35cd451c
GS
749 }
750 }
751 else {
67955e0c 752 gv = (GV*)sv;
a0d0e21e 753 }
67955e0c 754 av = GvAVn(gv);
533c011a 755 if (PL_op->op_private & OPpLVAL_INTRO)
67955e0c 756 av = save_ary(gv);
533c011a 757 if (PL_op->op_flags & OPf_REF) {
f5284f61 758 SETs((SV*)av);
a0d0e21e
LW
759 RETURN;
760 }
78f9721b
SM
761 else if (LVRET) {
762 if (GIMME == G_SCALAR)
763 Perl_croak(aTHX_ "Can't return array to lvalue"
764 " scalar context");
765 SETs((SV*)av);
766 RETURN;
767 }
a0d0e21e
LW
768 }
769 }
770
771 if (GIMME == G_ARRAY) {
a3b680e6 772 const I32 maxarg = AvFILL(av) + 1;
c2444246 773 (void)POPs; /* XXXX May be optimized away? */
1c846c1f 774 EXTEND(SP, maxarg);
93965878 775 if (SvRMAGICAL(av)) {
1c846c1f 776 U32 i;
eb160463 777 for (i=0; i < (U32)maxarg; i++) {
93965878 778 SV **svp = av_fetch(av, i, FALSE);
547d1dd8
HS
779 /* See note in pp_helem, and bug id #27839 */
780 SP[i+1] = svp
781 ? SvGMAGICAL(*svp) ? sv_mortalcopy(*svp) : *svp
782 : &PL_sv_undef;
93965878 783 }
1c846c1f 784 }
93965878
NIS
785 else {
786 Copy(AvARRAY(av), SP+1, maxarg, SV*);
787 }
a0d0e21e
LW
788 SP += maxarg;
789 }
c754c3d7 790 else if (GIMME_V == G_SCALAR) {
a0d0e21e 791 dTARGET;
a3b680e6 792 const I32 maxarg = AvFILL(av) + 1;
f5284f61 793 SETi(maxarg);
a0d0e21e
LW
794 }
795 RETURN;
796}
797
798PP(pp_rv2hv)
799{
39644a26 800 dSP; dTOPss;
a0d0e21e 801 HV *hv;
a3b680e6
AL
802 const I32 gimme = GIMME_V;
803 static const char return_hash_to_lvalue_scalar[] = "Can't return hash to lvalue scalar context";
a0d0e21e
LW
804
805 if (SvROK(sv)) {
806 wasref:
f5284f61
IZ
807 tryAMAGICunDEREF(to_hv);
808
a0d0e21e 809 hv = (HV*)SvRV(sv);
6d822dc4 810 if (SvTYPE(hv) != SVt_PVHV)
cea2e8a9 811 DIE(aTHX_ "Not a HASH reference");
533c011a 812 if (PL_op->op_flags & OPf_REF) {
a0d0e21e
LW
813 SETs((SV*)hv);
814 RETURN;
815 }
78f9721b 816 else if (LVRET) {
be85d344 817 if (gimme != G_ARRAY)
a3b680e6 818 Perl_croak(aTHX_ return_hash_to_lvalue_scalar );
78f9721b
SM
819 SETs((SV*)hv);
820 RETURN;
821 }
82d03984
RGS
822 else if (PL_op->op_flags & OPf_MOD
823 && PL_op->op_private & OPpLVAL_INTRO)
824 Perl_croak(aTHX_ PL_no_localize_ref);
a0d0e21e
LW
825 }
826 else {
6d822dc4 827 if (SvTYPE(sv) == SVt_PVHV) {
a0d0e21e 828 hv = (HV*)sv;
533c011a 829 if (PL_op->op_flags & OPf_REF) {
a0d0e21e
LW
830 SETs((SV*)hv);
831 RETURN;
832 }
78f9721b 833 else if (LVRET) {
be85d344 834 if (gimme != G_ARRAY)
a3b680e6 835 Perl_croak(aTHX_ return_hash_to_lvalue_scalar );
78f9721b
SM
836 SETs((SV*)hv);
837 RETURN;
838 }
a0d0e21e
LW
839 }
840 else {
67955e0c 841 GV *gv;
1c846c1f 842
a0d0e21e
LW
843 if (SvTYPE(sv) != SVt_PVGV) {
844 if (SvGMAGICAL(sv)) {
845 mg_get(sv);
846 if (SvROK(sv))
847 goto wasref;
848 }
849 if (!SvOK(sv)) {
533c011a
NIS
850 if (PL_op->op_flags & OPf_REF ||
851 PL_op->op_private & HINT_STRICT_REFS)
cea2e8a9 852 DIE(aTHX_ PL_no_usym, "a HASH");
599cee73 853 if (ckWARN(WARN_UNINITIALIZED))
29489e7c 854 report_uninit(sv);
be85d344 855 if (gimme == G_ARRAY) {
4633a7c4
LW
856 SP--;
857 RETURN;
858 }
a0d0e21e
LW
859 RETSETUNDEF;
860 }
35cd451c
GS
861 if ((PL_op->op_flags & OPf_SPECIAL) &&
862 !(PL_op->op_flags & OPf_MOD))
863 {
7a5fd60d 864 gv = (GV*)gv_fetchsv(sv, FALSE, SVt_PVHV);
c9d5ac95 865 if (!gv
7a5fd60d
NC
866 && (!is_gv_magical_sv(sv,0)
867 || !(gv = (GV*)gv_fetchsv(sv, TRUE, SVt_PVHV))))
c9d5ac95 868 {
35cd451c 869 RETSETUNDEF;
c9d5ac95 870 }
35cd451c
GS
871 }
872 else {
873 if (PL_op->op_private & HINT_STRICT_REFS)
7a5fd60d
NC
874 DIE(aTHX_ PL_no_symref_sv, sv, "a HASH");
875 gv = (GV*)gv_fetchsv(sv, TRUE, SVt_PVHV);
35cd451c
GS
876 }
877 }
878 else {
67955e0c 879 gv = (GV*)sv;
a0d0e21e 880 }
67955e0c 881 hv = GvHVn(gv);
533c011a 882 if (PL_op->op_private & OPpLVAL_INTRO)
67955e0c 883 hv = save_hash(gv);
533c011a 884 if (PL_op->op_flags & OPf_REF) {
a0d0e21e
LW
885 SETs((SV*)hv);
886 RETURN;
887 }
78f9721b 888 else if (LVRET) {
be85d344 889 if (gimme != G_ARRAY)
a3b680e6 890 Perl_croak(aTHX_ return_hash_to_lvalue_scalar );
78f9721b
SM
891 SETs((SV*)hv);
892 RETURN;
893 }
a0d0e21e
LW
894 }
895 }
896
be85d344 897 if (gimme == G_ARRAY) { /* array wanted */
3280af22 898 *PL_stack_sp = (SV*)hv;
cea2e8a9 899 return do_kv();
a0d0e21e 900 }
be85d344 901 else if (gimme == G_SCALAR) {
a0d0e21e 902 dTARGET;
243d6ab3 903 TARG = Perl_hv_scalar(aTHX_ hv);
a0d0e21e 904 SETTARG;
a0d0e21e 905 }
be85d344 906 RETURN;
a0d0e21e
LW
907}
908
10c8fecd
GS
909STATIC void
910S_do_oddball(pTHX_ HV *hash, SV **relem, SV **firstrelem)
911{
912 if (*relem) {
913 SV *tmpstr;
b464bac0 914 const HE *didstore;
6d822dc4
MS
915
916 if (ckWARN(WARN_MISC)) {
a3b680e6 917 const char *err;
10c8fecd
GS
918 if (relem == firstrelem &&
919 SvROK(*relem) &&
920 (SvTYPE(SvRV(*relem)) == SVt_PVAV ||
921 SvTYPE(SvRV(*relem)) == SVt_PVHV))
922 {
a3b680e6 923 err = "Reference found where even-sized list expected";
10c8fecd
GS
924 }
925 else
a3b680e6
AL
926 err = "Odd number of elements in hash assignment";
927 Perl_warner(aTHX_ packWARN(WARN_MISC), err);
10c8fecd 928 }
6d822dc4
MS
929
930 tmpstr = NEWSV(29,0);
931 didstore = hv_store_ent(hash,*relem,tmpstr,0);
932 if (SvMAGICAL(hash)) {
933 if (SvSMAGICAL(tmpstr))
934 mg_set(tmpstr);
935 if (!didstore)
936 sv_2mortal(tmpstr);
937 }
938 TAINT_NOT;
10c8fecd
GS
939 }
940}
941
a0d0e21e
LW
942PP(pp_aassign)
943{
27da23d5 944 dVAR; dSP;
3280af22
NIS
945 SV **lastlelem = PL_stack_sp;
946 SV **lastrelem = PL_stack_base + POPMARK;
947 SV **firstrelem = PL_stack_base + POPMARK + 1;
a0d0e21e
LW
948 SV **firstlelem = lastrelem + 1;
949
950 register SV **relem;
951 register SV **lelem;
952
953 register SV *sv;
954 register AV *ary;
955
54310121 956 I32 gimme;
a0d0e21e
LW
957 HV *hash;
958 I32 i;
959 int magic;
ca65944e 960 int duplicates = 0;
5637b936
NC
961 SV **firsthashrelem = 0; /* "= 0" keeps gcc 2.95 quiet */
962
a0d0e21e 963
3280af22 964 PL_delaymagic = DM_DELAY; /* catch simultaneous items */
ca65944e 965 gimme = GIMME_V;
a0d0e21e
LW
966
967 /* If there's a common identifier on both sides we have to take
968 * special care that assigning the identifier on the left doesn't
969 * clobber a value on the right that's used later in the list.
970 */
10c8fecd 971 if (PL_op->op_private & (OPpASSIGN_COMMON)) {
cc5e57d2 972 EXTEND_MORTAL(lastrelem - firstrelem + 1);
10c8fecd 973 for (relem = firstrelem; relem <= lastrelem; relem++) {
155aba94 974 if ((sv = *relem)) {
a1f49e72 975 TAINT_NOT; /* Each item is independent */
10c8fecd 976 *relem = sv_mortalcopy(sv);
a1f49e72 977 }
10c8fecd 978 }
a0d0e21e
LW
979 }
980
981 relem = firstrelem;
982 lelem = firstlelem;
983 ary = Null(AV*);
984 hash = Null(HV*);
10c8fecd 985
a0d0e21e 986 while (lelem <= lastlelem) {
bbce6d69 987 TAINT_NOT; /* Each item stands on its own, taintwise. */
a0d0e21e
LW
988 sv = *lelem++;
989 switch (SvTYPE(sv)) {
990 case SVt_PVAV:
991 ary = (AV*)sv;
748a9306 992 magic = SvMAGICAL(ary) != 0;
a0d0e21e 993 av_clear(ary);
7e42bd57 994 av_extend(ary, lastrelem - relem);
a0d0e21e
LW
995 i = 0;
996 while (relem <= lastrelem) { /* gobble up all the rest */
5117ca91 997 SV **didstore;
a0d0e21e 998 assert(*relem);
f2b990bf 999 sv = newSVsv(*relem);
a0d0e21e 1000 *(relem++) = sv;
5117ca91
GS
1001 didstore = av_store(ary,i++,sv);
1002 if (magic) {
fb73857a
PP
1003 if (SvSMAGICAL(sv))
1004 mg_set(sv);
5117ca91 1005 if (!didstore)
8127e0e3 1006 sv_2mortal(sv);
5117ca91 1007 }
bbce6d69 1008 TAINT_NOT;
a0d0e21e
LW
1009 }
1010 break;
10c8fecd 1011 case SVt_PVHV: { /* normal hash */
a0d0e21e
LW
1012 SV *tmpstr;
1013
1014 hash = (HV*)sv;
748a9306 1015 magic = SvMAGICAL(hash) != 0;
a0d0e21e 1016 hv_clear(hash);
ca65944e 1017 firsthashrelem = relem;
a0d0e21e
LW
1018
1019 while (relem < lastrelem) { /* gobble up all the rest */
5117ca91 1020 HE *didstore;
4633a7c4 1021 if (*relem)
a0d0e21e 1022 sv = *(relem++);
4633a7c4 1023 else
3280af22 1024 sv = &PL_sv_no, relem++;
a0d0e21e
LW
1025 tmpstr = NEWSV(29,0);
1026 if (*relem)
1027 sv_setsv(tmpstr,*relem); /* value */
1028 *(relem++) = tmpstr;
ca65944e
RGS
1029 if (gimme != G_VOID && hv_exists_ent(hash, sv, 0))
1030 /* key overwrites an existing entry */
1031 duplicates += 2;
5117ca91
GS
1032 didstore = hv_store_ent(hash,sv,tmpstr,0);
1033 if (magic) {
fb73857a
PP
1034 if (SvSMAGICAL(tmpstr))
1035 mg_set(tmpstr);
5117ca91 1036 if (!didstore)
8127e0e3 1037 sv_2mortal(tmpstr);
5117ca91 1038 }
bbce6d69 1039 TAINT_NOT;
8e07c86e 1040 }
6a0deba8 1041 if (relem == lastrelem) {
10c8fecd 1042 do_oddball(hash, relem, firstrelem);
6a0deba8 1043 relem++;
1930e939 1044 }
a0d0e21e
LW
1045 }
1046 break;
1047 default:
6fc92669
GS
1048 if (SvIMMORTAL(sv)) {
1049 if (relem <= lastrelem)
1050 relem++;
1051 break;
a0d0e21e
LW
1052 }
1053 if (relem <= lastrelem) {
1054 sv_setsv(sv, *relem);
1055 *(relem++) = sv;
1056 }
1057 else
3280af22 1058 sv_setsv(sv, &PL_sv_undef);
a0d0e21e
LW
1059 SvSETMAGIC(sv);
1060 break;
1061 }
1062 }
3280af22
NIS
1063 if (PL_delaymagic & ~DM_DELAY) {
1064 if (PL_delaymagic & DM_UID) {
a0d0e21e 1065#ifdef HAS_SETRESUID
fb934a90
RD
1066 (void)setresuid((PL_delaymagic & DM_RUID) ? PL_uid : (Uid_t)-1,
1067 (PL_delaymagic & DM_EUID) ? PL_euid : (Uid_t)-1,
1068 (Uid_t)-1);
56febc5e
AD
1069#else
1070# ifdef HAS_SETREUID
fb934a90
RD
1071 (void)setreuid((PL_delaymagic & DM_RUID) ? PL_uid : (Uid_t)-1,
1072 (PL_delaymagic & DM_EUID) ? PL_euid : (Uid_t)-1);
56febc5e
AD
1073# else
1074# ifdef HAS_SETRUID
b28d0864
NIS
1075 if ((PL_delaymagic & DM_UID) == DM_RUID) {
1076 (void)setruid(PL_uid);
1077 PL_delaymagic &= ~DM_RUID;
a0d0e21e 1078 }
56febc5e
AD
1079# endif /* HAS_SETRUID */
1080# ifdef HAS_SETEUID
b28d0864 1081 if ((PL_delaymagic & DM_UID) == DM_EUID) {
fb934a90 1082 (void)seteuid(PL_euid);
b28d0864 1083 PL_delaymagic &= ~DM_EUID;
a0d0e21e 1084 }
56febc5e 1085# endif /* HAS_SETEUID */
b28d0864
NIS
1086 if (PL_delaymagic & DM_UID) {
1087 if (PL_uid != PL_euid)
cea2e8a9 1088 DIE(aTHX_ "No setreuid available");
b28d0864 1089 (void)PerlProc_setuid(PL_uid);
a0d0e21e 1090 }
56febc5e
AD
1091# endif /* HAS_SETREUID */
1092#endif /* HAS_SETRESUID */
d8eceb89
JH
1093 PL_uid = PerlProc_getuid();
1094 PL_euid = PerlProc_geteuid();
a0d0e21e 1095 }
3280af22 1096 if (PL_delaymagic & DM_GID) {
a0d0e21e 1097#ifdef HAS_SETRESGID
fb934a90
RD
1098 (void)setresgid((PL_delaymagic & DM_RGID) ? PL_gid : (Gid_t)-1,
1099 (PL_delaymagic & DM_EGID) ? PL_egid : (Gid_t)-1,
1100 (Gid_t)-1);
56febc5e
AD
1101#else
1102# ifdef HAS_SETREGID
fb934a90
RD
1103 (void)setregid((PL_delaymagic & DM_RGID) ? PL_gid : (Gid_t)-1,
1104 (PL_delaymagic & DM_EGID) ? PL_egid : (Gid_t)-1);
56febc5e
AD
1105# else
1106# ifdef HAS_SETRGID
b28d0864
NIS
1107 if ((PL_delaymagic & DM_GID) == DM_RGID) {
1108 (void)setrgid(PL_gid);
1109 PL_delaymagic &= ~DM_RGID;
a0d0e21e 1110 }
56febc5e
AD
1111# endif /* HAS_SETRGID */
1112# ifdef HAS_SETEGID
b28d0864 1113 if ((PL_delaymagic & DM_GID) == DM_EGID) {
fb934a90 1114 (void)setegid(PL_egid);
b28d0864 1115 PL_delaymagic &= ~DM_EGID;
a0d0e21e 1116 }
56febc5e 1117# endif /* HAS_SETEGID */
b28d0864
NIS
1118 if (PL_delaymagic & DM_GID) {
1119 if (PL_gid != PL_egid)
cea2e8a9 1120 DIE(aTHX_ "No setregid available");
b28d0864 1121 (void)PerlProc_setgid(PL_gid);
a0d0e21e 1122 }
56febc5e
AD
1123# endif /* HAS_SETREGID */
1124#endif /* HAS_SETRESGID */
d8eceb89
JH
1125 PL_gid = PerlProc_getgid();
1126 PL_egid = PerlProc_getegid();
a0d0e21e 1127 }
3280af22 1128 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
a0d0e21e 1129 }
3280af22 1130 PL_delaymagic = 0;
54310121 1131
54310121
PP
1132 if (gimme == G_VOID)
1133 SP = firstrelem - 1;
1134 else if (gimme == G_SCALAR) {
1135 dTARGET;
1136 SP = firstrelem;
ca65944e 1137 SETi(lastrelem - firstrelem + 1 - duplicates);
54310121
PP
1138 }
1139 else {
ca65944e 1140 if (ary)
a0d0e21e 1141 SP = lastrelem;
ca65944e
RGS
1142 else if (hash) {
1143 if (duplicates) {
1144 /* Removes from the stack the entries which ended up as
1145 * duplicated keys in the hash (fix for [perl #24380]) */
1146 Move(firsthashrelem + duplicates,
1147 firsthashrelem, duplicates, SV**);
1148 lastrelem -= duplicates;
1149 }
1150 SP = lastrelem;
1151 }
a0d0e21e
LW
1152 else
1153 SP = firstrelem + (lastlelem - firstlelem);
0c8c7a05 1154 lelem = firstlelem + (relem - firstrelem);
5f05dabc 1155 while (relem <= SP)
3280af22 1156 *relem++ = (lelem <= lastlelem) ? *lelem++ : &PL_sv_undef;
a0d0e21e 1157 }
54310121 1158 RETURN;
a0d0e21e
LW
1159}
1160
8782bef2
GB
1161PP(pp_qr)
1162{
39644a26 1163 dSP;
8782bef2
GB
1164 register PMOP *pm = cPMOP;
1165 SV *rv = sv_newmortal();
57668c4d 1166 SV *sv = newSVrv(rv, "Regexp");
e08e52cf
AMS
1167 if (pm->op_pmdynflags & PMdf_TAINTED)
1168 SvTAINTED_on(rv);
aaa362c4 1169 sv_magic(sv,(SV*)ReREFCNT_inc(PM_GETRE(pm)), PERL_MAGIC_qr,0,0);
8782bef2
GB
1170 RETURNX(PUSHs(rv));
1171}
1172
a0d0e21e
LW
1173PP(pp_match)
1174{
39644a26 1175 dSP; dTARG;
a0d0e21e 1176 register PMOP *pm = cPMOP;
d65afb4b 1177 PMOP *dynpm = pm;
5c144d81
NC
1178 const register char *t;
1179 const register char *s;
1180 const char *strend;
a0d0e21e 1181 I32 global;
f722798b 1182 I32 r_flags = REXEC_CHECKED;
5c144d81 1183 const char *truebase; /* Start of string */
aaa362c4 1184 register REGEXP *rx = PM_GETRE(pm);
b3eb6a9b 1185 bool rxtainted;
a3b680e6 1186 const I32 gimme = GIMME;
a0d0e21e 1187 STRLEN len;
748a9306 1188 I32 minmatch = 0;
a3b680e6 1189 const I32 oldsave = PL_savestack_ix;
f86702cc 1190 I32 update_minmatch = 1;
e60df1fa 1191 I32 had_zerolen = 0;
a0d0e21e 1192
533c011a 1193 if (PL_op->op_flags & OPf_STACKED)
a0d0e21e 1194 TARG = POPs;
59f00321
RGS
1195 else if (PL_op->op_private & OPpTARGET_MY)
1196 GETTARGET;
a0d0e21e 1197 else {
54b9620d 1198 TARG = DEFSV;
a0d0e21e
LW
1199 EXTEND(SP,1);
1200 }
d9f424b2 1201
c277df42 1202 PUTBACK; /* EVAL blocks need stack_sp. */
5c144d81 1203 s = SvPV_const(TARG, len);
a0d0e21e 1204 if (!s)
2269b42e 1205 DIE(aTHX_ "panic: pp_match");
890ce7af 1206 strend = s + len;
b3eb6a9b 1207 rxtainted = ((pm->op_pmdynflags & PMdf_TAINTED) ||
3280af22 1208 (PL_tainted && (pm->op_pmflags & PMf_RETAINT)));
9212bbba 1209 TAINT_NOT;
a0d0e21e 1210
a30b2f1f 1211 RX_MATCH_UTF8_set(rx, DO_UTF8(TARG));
d9f424b2 1212
d65afb4b 1213 /* PMdf_USED is set after a ?? matches once */
48c036b1 1214 if (pm->op_pmdynflags & PMdf_USED) {
c277df42 1215 failure:
a0d0e21e
LW
1216 if (gimme == G_ARRAY)
1217 RETURN;
1218 RETPUSHNO;
1219 }
1220
d65afb4b 1221 /* empty pattern special-cased to use last successful pattern if possible */
3280af22
NIS
1222 if (!rx->prelen && PL_curpm) {
1223 pm = PL_curpm;
aaa362c4 1224 rx = PM_GETRE(pm);
a0d0e21e 1225 }
d65afb4b 1226
eb160463 1227 if (rx->minlen > (I32)len)
d65afb4b 1228 goto failure;
c277df42 1229
a0d0e21e 1230 truebase = t = s;
ad94a511
IZ
1231
1232 /* XXXX What part of this is needed with true \G-support? */
d65afb4b 1233 if ((global = dynpm->op_pmflags & PMf_GLOBAL)) {
cf93c79d 1234 rx->startp[0] = -1;
a0d0e21e 1235 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
14befaf4 1236 MAGIC* mg = mg_find(TARG, PERL_MAGIC_regex_global);
565764a8 1237 if (mg && mg->mg_len >= 0) {
b7a35066 1238 if (!(rx->reganch & ROPT_GPOS_SEEN))
1c846c1f 1239 rx->endp[0] = rx->startp[0] = mg->mg_len;
0ef3e39e
HS
1240 else if (rx->reganch & ROPT_ANCH_GPOS) {
1241 r_flags |= REXEC_IGNOREPOS;
1c846c1f 1242 rx->endp[0] = rx->startp[0] = mg->mg_len;
0ef3e39e 1243 }
748a9306 1244 minmatch = (mg->mg_flags & MGf_MINMATCH);
f86702cc 1245 update_minmatch = 0;
748a9306 1246 }
a0d0e21e
LW
1247 }
1248 }
14977893
JH
1249 if ((!global && rx->nparens)
1250 || SvTEMP(TARG) || PL_sawampersand)
1251 r_flags |= REXEC_COPY_STR;
1c846c1f 1252 if (SvSCREAM(TARG))
22e551b9
IZ
1253 r_flags |= REXEC_SCREAM;
1254
a0d0e21e 1255play_it_again:
cf93c79d
IZ
1256 if (global && rx->startp[0] != -1) {
1257 t = s = rx->endp[0] + truebase;
d9f97599 1258 if ((s + rx->minlen) > strend)
a0d0e21e 1259 goto nope;
f86702cc 1260 if (update_minmatch++)
e60df1fa 1261 minmatch = had_zerolen;
a0d0e21e 1262 }
60aeb6fd
NIS
1263 if (rx->reganch & RE_USE_INTUIT &&
1264 DO_UTF8(TARG) == ((rx->reganch & ROPT_UTF8) != 0)) {
5c144d81
NC
1265 /* FIXME - can PL_bostr be made const char *? */
1266 PL_bostr = (char *)truebase;
1267 s = CALLREG_INTUIT_START(aTHX_ rx, TARG, (char *)s, (char *)strend, r_flags, NULL);
f722798b
IZ
1268
1269 if (!s)
1270 goto nope;
1271 if ( (rx->reganch & ROPT_CHECK_ALL)
14977893 1272 && !PL_sawampersand
f722798b
IZ
1273 && ((rx->reganch & ROPT_NOSCAN)
1274 || !((rx->reganch & RE_INTUIT_TAIL)
05b4157f
GS
1275 && (r_flags & REXEC_SCREAM)))
1276 && !SvROK(TARG)) /* Cannot trust since INTUIT cannot guess ^ */
f722798b 1277 goto yup;
a0d0e21e 1278 }
5c144d81 1279 if (CALLREGEXEC(aTHX_ rx, (char*)s, (char *)strend, (char*)truebase, minmatch, TARG, NULL, r_flags))
bbce6d69 1280 {
3280af22 1281 PL_curpm = pm;
d65afb4b
HS
1282 if (dynpm->op_pmflags & PMf_ONCE)
1283 dynpm->op_pmdynflags |= PMdf_USED;
a0d0e21e
LW
1284 goto gotcha;
1285 }
1286 else
1287 goto ret_no;
1288 /*NOTREACHED*/
1289
1290 gotcha:
72311751
GS
1291 if (rxtainted)
1292 RX_MATCH_TAINTED_on(rx);
1293 TAINT_IF(RX_MATCH_TAINTED(rx));
a0d0e21e 1294 if (gimme == G_ARRAY) {
a3b680e6
AL
1295 const I32 nparens = rx->nparens;
1296 I32 i = (global && !nparens) ? 1 : 0;
a0d0e21e 1297
c277df42 1298 SPAGAIN; /* EVAL blocks could move the stack. */
ffc61ed2
JH
1299 EXTEND(SP, nparens + i);
1300 EXTEND_MORTAL(nparens + i);
1301 for (i = !i; i <= nparens; i++) {
a0d0e21e 1302 PUSHs(sv_newmortal());
cf93c79d 1303 if ((rx->startp[i] != -1) && rx->endp[i] != -1 ) {
b464bac0 1304 const I32 len = rx->endp[i] - rx->startp[i];
289555fe 1305 s = rx->startp[i] + truebase;
290deeac
A
1306 if (rx->endp[i] < 0 || rx->startp[i] < 0 ||
1307 len < 0 || len > strend - s)
1308 DIE(aTHX_ "panic: pp_match start/end pointers");
a0d0e21e 1309 sv_setpvn(*SP, s, len);
cce850e4 1310 if (DO_UTF8(TARG) && is_utf8_string((U8*)s, len))
a197cbdd 1311 SvUTF8_on(*SP);
a0d0e21e
LW
1312 }
1313 }
1314 if (global) {
d65afb4b 1315 if (dynpm->op_pmflags & PMf_CONTINUE) {
0af80b60
HS
1316 MAGIC* mg = 0;
1317 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
1318 mg = mg_find(TARG, PERL_MAGIC_regex_global);
1319 if (!mg) {
1320 sv_magic(TARG, (SV*)0, PERL_MAGIC_regex_global, Nullch, 0);
1321 mg = mg_find(TARG, PERL_MAGIC_regex_global);
1322 }
1323 if (rx->startp[0] != -1) {
1324 mg->mg_len = rx->endp[0];
1325 if (rx->startp[0] == rx->endp[0])
1326 mg->mg_flags |= MGf_MINMATCH;
1327 else
1328 mg->mg_flags &= ~MGf_MINMATCH;
1329 }
1330 }
cf93c79d
IZ
1331 had_zerolen = (rx->startp[0] != -1
1332 && rx->startp[0] == rx->endp[0]);
c277df42 1333 PUTBACK; /* EVAL blocks may use stack */
cf93c79d 1334 r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST;
a0d0e21e
LW
1335 goto play_it_again;
1336 }
ffc61ed2 1337 else if (!nparens)
bde848c5 1338 XPUSHs(&PL_sv_yes);
4633a7c4 1339 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1340 RETURN;
1341 }
1342 else {
1343 if (global) {
1344 MAGIC* mg = 0;
1345 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
14befaf4 1346 mg = mg_find(TARG, PERL_MAGIC_regex_global);
a0d0e21e 1347 if (!mg) {
14befaf4
DM
1348 sv_magic(TARG, (SV*)0, PERL_MAGIC_regex_global, Nullch, 0);
1349 mg = mg_find(TARG, PERL_MAGIC_regex_global);
a0d0e21e 1350 }
cf93c79d
IZ
1351 if (rx->startp[0] != -1) {
1352 mg->mg_len = rx->endp[0];
d9f97599 1353 if (rx->startp[0] == rx->endp[0])
748a9306
LW
1354 mg->mg_flags |= MGf_MINMATCH;
1355 else
1356 mg->mg_flags &= ~MGf_MINMATCH;
1357 }
a0d0e21e 1358 }
4633a7c4 1359 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1360 RETPUSHYES;
1361 }
1362
f722798b 1363yup: /* Confirmed by INTUIT */
72311751
GS
1364 if (rxtainted)
1365 RX_MATCH_TAINTED_on(rx);
1366 TAINT_IF(RX_MATCH_TAINTED(rx));
3280af22 1367 PL_curpm = pm;
d65afb4b
HS
1368 if (dynpm->op_pmflags & PMf_ONCE)
1369 dynpm->op_pmdynflags |= PMdf_USED;
cf93c79d
IZ
1370 if (RX_MATCH_COPIED(rx))
1371 Safefree(rx->subbeg);
1372 RX_MATCH_COPIED_off(rx);
1373 rx->subbeg = Nullch;
a0d0e21e 1374 if (global) {
5c144d81
NC
1375 /* FIXME - should rx->subbeg be const char *? */
1376 rx->subbeg = (char *) truebase;
cf93c79d 1377 rx->startp[0] = s - truebase;
a30b2f1f 1378 if (RX_MATCH_UTF8(rx)) {
60aeb6fd
NIS
1379 char *t = (char*)utf8_hop((U8*)s, rx->minlen);
1380 rx->endp[0] = t - truebase;
1381 }
1382 else {
1383 rx->endp[0] = s - truebase + rx->minlen;
1384 }
cf93c79d 1385 rx->sublen = strend - truebase;
a0d0e21e 1386 goto gotcha;
1c846c1f 1387 }
14977893
JH
1388 if (PL_sawampersand) {
1389 I32 off;
f8c7b90f 1390#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
1391 if (SvIsCOW(TARG) || (SvFLAGS(TARG) & CAN_COW_MASK) == CAN_COW_FLAGS) {
1392 if (DEBUG_C_TEST) {
1393 PerlIO_printf(Perl_debug_log,
1394 "Copy on write: pp_match $& capture, type %d, truebase=%p, t=%p, difference %d\n",
1395 (int) SvTYPE(TARG), truebase, t,
1396 (int)(t-truebase));
1397 }
1398 rx->saved_copy = sv_setsv_cow(rx->saved_copy, TARG);
555831ce 1399 rx->subbeg = (char *) SvPVX_const(rx->saved_copy) + (t - truebase);
ed252734
NC
1400 assert (SvPOKp(rx->saved_copy));
1401 } else
1402#endif
1403 {
14977893 1404
ed252734 1405 rx->subbeg = savepvn(t, strend - t);
f8c7b90f 1406#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
1407 rx->saved_copy = Nullsv;
1408#endif
1409 }
14977893
JH
1410 rx->sublen = strend - t;
1411 RX_MATCH_COPIED_on(rx);
1412 off = rx->startp[0] = s - t;
1413 rx->endp[0] = off + rx->minlen;
1414 }
1415 else { /* startp/endp are used by @- @+. */
1416 rx->startp[0] = s - truebase;
1417 rx->endp[0] = s - truebase + rx->minlen;
1418 }
2d862feb 1419 rx->nparens = rx->lastparen = rx->lastcloseparen = 0; /* used by @-, @+, and $^N */
4633a7c4 1420 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1421 RETPUSHYES;
1422
1423nope:
a0d0e21e 1424ret_no:
d65afb4b 1425 if (global && !(dynpm->op_pmflags & PMf_CONTINUE)) {
a0d0e21e 1426 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
14befaf4 1427 MAGIC* mg = mg_find(TARG, PERL_MAGIC_regex_global);
a0d0e21e 1428 if (mg)
565764a8 1429 mg->mg_len = -1;
a0d0e21e
LW
1430 }
1431 }
4633a7c4 1432 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1433 if (gimme == G_ARRAY)
1434 RETURN;
1435 RETPUSHNO;
1436}
1437
1438OP *
864dbfa3 1439Perl_do_readline(pTHX)
a0d0e21e 1440{
27da23d5 1441 dVAR; dSP; dTARGETSTACKED;
a0d0e21e
LW
1442 register SV *sv;
1443 STRLEN tmplen = 0;
1444 STRLEN offset;
760ac839 1445 PerlIO *fp;
a3b680e6
AL
1446 register IO * const io = GvIO(PL_last_in_gv);
1447 register const I32 type = PL_op->op_type;
1448 const I32 gimme = GIMME_V;
e79b0511 1449 MAGIC *mg;
a0d0e21e 1450
5b468f54 1451 if (io && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar))) {
e79b0511 1452 PUSHMARK(SP);
5b468f54 1453 XPUSHs(SvTIED_obj((SV*)io, mg));
e79b0511
PP
1454 PUTBACK;
1455 ENTER;
864dbfa3 1456 call_method("READLINE", gimme);
e79b0511
PP
1457 LEAVE;
1458 SPAGAIN;
0b7c7b4f
HS
1459 if (gimme == G_SCALAR) {
1460 SV* result = POPs;
1461 SvSetSV_nosteal(TARG, result);
1462 PUSHTARG;
1463 }
e79b0511
PP
1464 RETURN;
1465 }
a0d0e21e
LW
1466 fp = Nullfp;
1467 if (io) {
1468 fp = IoIFP(io);
1469 if (!fp) {
1470 if (IoFLAGS(io) & IOf_ARGV) {
1471 if (IoFLAGS(io) & IOf_START) {
a0d0e21e 1472 IoLINES(io) = 0;
3280af22 1473 if (av_len(GvAVn(PL_last_in_gv)) < 0) {
1d7c1841 1474 IoFLAGS(io) &= ~IOf_START;
9d116dd7 1475 do_open(PL_last_in_gv,"-",1,FALSE,O_RDONLY,0,Nullfp);
c69033f2 1476 sv_setpvn(GvSVn(PL_last_in_gv), "-", 1);
3280af22 1477 SvSETMAGIC(GvSV(PL_last_in_gv));
a2008d6d
GS
1478 fp = IoIFP(io);
1479 goto have_fp;
a0d0e21e
LW
1480 }
1481 }
3280af22 1482 fp = nextargv(PL_last_in_gv);
a0d0e21e 1483 if (!fp) { /* Note: fp != IoIFP(io) */
3280af22 1484 (void)do_close(PL_last_in_gv, FALSE); /* now it does*/
a0d0e21e
LW
1485 }
1486 }
0d44d22b
NC
1487 else if (type == OP_GLOB)
1488 fp = Perl_start_glob(aTHX_ POPs, io);
a0d0e21e
LW
1489 }
1490 else if (type == OP_GLOB)
1491 SP--;
a00b5bd3 1492 else if (ckWARN(WARN_IO) && IoTYPE(io) == IoTYPE_WRONLY) {
4c80c0b2 1493 report_evil_fh(PL_last_in_gv, io, OP_phoney_OUTPUT_ONLY);
a00b5bd3 1494 }
a0d0e21e
LW
1495 }
1496 if (!fp) {
790090df
HS
1497 if (ckWARN2(WARN_GLOB, WARN_CLOSED)
1498 && (!io || !(IoFLAGS(io) & IOf_START))) {
3f4520fe 1499 if (type == OP_GLOB)
9014280d 1500 Perl_warner(aTHX_ packWARN(WARN_GLOB),
af8c498a
GS
1501 "glob failed (can't start child: %s)",
1502 Strerror(errno));
69282e91 1503 else
bc37a18f 1504 report_evil_fh(PL_last_in_gv, io, PL_op->op_type);
3f4520fe 1505 }
54310121 1506 if (gimme == G_SCALAR) {
79628082 1507 /* undef TARG, and push that undefined value */
ba92458f
AE
1508 if (type != OP_RCATLINE) {
1509 SV_CHECK_THINKFIRST_COW_DROP(TARG);
0c34ef67 1510 SvOK_off(TARG);
ba92458f 1511 }
a0d0e21e
LW
1512 PUSHTARG;
1513 }
1514 RETURN;
1515 }
a2008d6d 1516 have_fp:
54310121 1517 if (gimme == G_SCALAR) {
a0d0e21e 1518 sv = TARG;
9607fc9c
PP
1519 if (SvROK(sv))
1520 sv_unref(sv);
862a34c6 1521 SvUPGRADE(sv, SVt_PV);
a0d0e21e 1522 tmplen = SvLEN(sv); /* remember if already alloced */
bc44a8a2 1523 if (!tmplen && !SvREADONLY(sv))
a0d0e21e 1524 Sv_Grow(sv, 80); /* try short-buffering it */
2b5e58c4
AMS
1525 offset = 0;
1526 if (type == OP_RCATLINE && SvOK(sv)) {
1527 if (!SvPOK(sv)) {
8b6b16e7 1528 SvPV_force_nolen(sv);
2b5e58c4 1529 }
a0d0e21e 1530 offset = SvCUR(sv);
2b5e58c4 1531 }
a0d0e21e 1532 }
54310121
PP
1533 else {
1534 sv = sv_2mortal(NEWSV(57, 80));
1535 offset = 0;
1536 }
fbad3eb5 1537
3887d568
AP
1538 /* This should not be marked tainted if the fp is marked clean */
1539#define MAYBE_TAINT_LINE(io, sv) \
1540 if (!(IoFLAGS(io) & IOf_UNTAINT)) { \
1541 TAINT; \
1542 SvTAINTED_on(sv); \
1543 }
1544
684bef36 1545/* delay EOF state for a snarfed empty file */
fbad3eb5 1546#define SNARF_EOF(gimme,rs,io,sv) \
684bef36 1547 (gimme != G_SCALAR || SvCUR(sv) \
b9fee9ba 1548 || (IoFLAGS(io) & IOf_NOLINE) || !RsSNARF(rs))
fbad3eb5 1549
a0d0e21e 1550 for (;;) {
09e8efcc 1551 PUTBACK;
fbad3eb5 1552 if (!sv_gets(sv, fp, offset)
2d726892
TF
1553 && (type == OP_GLOB
1554 || SNARF_EOF(gimme, PL_rs, io, sv)
1555 || PerlIO_error(fp)))
fbad3eb5 1556 {
760ac839 1557 PerlIO_clearerr(fp);
a0d0e21e 1558 if (IoFLAGS(io) & IOf_ARGV) {
3280af22 1559 fp = nextargv(PL_last_in_gv);
a0d0e21e
LW
1560 if (fp)
1561 continue;
3280af22 1562 (void)do_close(PL_last_in_gv, FALSE);
a0d0e21e
LW
1563 }
1564 else if (type == OP_GLOB) {
e476b1b5 1565 if (!do_close(PL_last_in_gv, FALSE) && ckWARN(WARN_GLOB)) {
9014280d 1566 Perl_warner(aTHX_ packWARN(WARN_GLOB),
4eb79ab5 1567 "glob failed (child exited with status %d%s)",
894356b3 1568 (int)(STATUS_CURRENT >> 8),
cf494569 1569 (STATUS_CURRENT & 0x80) ? ", core dumped" : "");
4eb79ab5 1570 }
a0d0e21e 1571 }
54310121 1572 if (gimme == G_SCALAR) {
ba92458f
AE
1573 if (type != OP_RCATLINE) {
1574 SV_CHECK_THINKFIRST_COW_DROP(TARG);
0c34ef67 1575 SvOK_off(TARG);
ba92458f 1576 }
09e8efcc 1577 SPAGAIN;
a0d0e21e
LW
1578 PUSHTARG;
1579 }
3887d568 1580 MAYBE_TAINT_LINE(io, sv);
a0d0e21e
LW
1581 RETURN;
1582 }
3887d568 1583 MAYBE_TAINT_LINE(io, sv);
a0d0e21e 1584 IoLINES(io)++;
b9fee9ba 1585 IoFLAGS(io) |= IOf_NOLINE;
71be2cbc 1586 SvSETMAGIC(sv);
09e8efcc 1587 SPAGAIN;
a0d0e21e 1588 XPUSHs(sv);
a0d0e21e
LW
1589 if (type == OP_GLOB) {
1590 char *tmps;
349d4f2f 1591 const char *t1;
a0d0e21e 1592
3280af22 1593 if (SvCUR(sv) > 0 && SvCUR(PL_rs) > 0) {
c07a80fd 1594 tmps = SvEND(sv) - 1;
aa07b2f6 1595 if (*tmps == *SvPVX_const(PL_rs)) {
c07a80fd 1596 *tmps = '\0';
b162af07 1597 SvCUR_set(sv, SvCUR(sv) - 1);
c07a80fd
PP
1598 }
1599 }
349d4f2f
NC
1600 for (t1 = SvPVX_const(sv); *t1; t1++)
1601 if (!isALPHA(*t1) && !isDIGIT(*t1) &&
1602 strchr("$&*(){}[]'\";\\|?<>~`", *t1))
a0d0e21e 1603 break;
349d4f2f 1604 if (*t1 && PerlLIO_lstat(SvPVX_const(sv), &PL_statbuf) < 0) {
a0d0e21e
LW
1605 (void)POPs; /* Unmatched wildcard? Chuck it... */
1606 continue;
1607 }
2d79bf7f 1608 } else if (SvUTF8(sv)) { /* OP_READLINE, OP_RCATLINE */
349d4f2f 1609 const U8 *s = (const U8*)SvPVX_const(sv) + offset;
7fc63493
AL
1610 const STRLEN len = SvCUR(sv) - offset;
1611 const U8 *f;
2d79bf7f
JH
1612
1613 if (ckWARN(WARN_UTF8) &&
1614 !Perl_is_utf8_string_loc(aTHX_ s, len, &f))
1615 /* Emulate :encoding(utf8) warning in the same case. */
1616 Perl_warner(aTHX_ packWARN(WARN_UTF8),
1617 "utf8 \"\\x%02X\" does not map to Unicode",
1618 f < (U8*)SvEND(sv) ? *f : 0);
a0d0e21e 1619 }
54310121 1620 if (gimme == G_ARRAY) {
a0d0e21e 1621 if (SvLEN(sv) - SvCUR(sv) > 20) {
1da4ca5f 1622 SvPV_shrink_to_cur(sv);
a0d0e21e
LW
1623 }
1624 sv = sv_2mortal(NEWSV(58, 80));
1625 continue;
1626 }
54310121 1627 else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
a0d0e21e 1628 /* try to reclaim a bit of scalar space (only on 1st alloc) */
d5b5861b
NC
1629 const STRLEN new_len
1630 = SvCUR(sv) < 60 ? 80 : SvCUR(sv)+40; /* allow some slop */
1da4ca5f 1631 SvPV_renew(sv, new_len);
a0d0e21e
LW
1632 }
1633 RETURN;
1634 }
1635}
1636
1637PP(pp_enter)
1638{
27da23d5 1639 dVAR; dSP;
c09156bb 1640 register PERL_CONTEXT *cx;
533c011a 1641 I32 gimme = OP_GIMME(PL_op, -1);
a0d0e21e 1642
54310121
PP
1643 if (gimme == -1) {
1644 if (cxstack_ix >= 0)
1645 gimme = cxstack[cxstack_ix].blk_gimme;
1646 else
1647 gimme = G_SCALAR;
1648 }
a0d0e21e
LW
1649
1650 ENTER;
1651
1652 SAVETMPS;
924508f0 1653 PUSHBLOCK(cx, CXt_BLOCK, SP);
a0d0e21e
LW
1654
1655 RETURN;
1656}
1657
1658PP(pp_helem)
1659{
39644a26 1660 dSP;
760ac839 1661 HE* he;
ae77835f 1662 SV **svp;
a0d0e21e 1663 SV *keysv = POPs;
a0d0e21e 1664 HV *hv = (HV*)POPs;
a3b680e6
AL
1665 const U32 lval = PL_op->op_flags & OPf_MOD || LVRET;
1666 const U32 defer = PL_op->op_private & OPpLVAL_DEFER;
be6c24e0 1667 SV *sv;
c158a4fd 1668 const U32 hash = (SvIsCOW_shared_hash(keysv)) ? SvSHARED_HASH(keysv) : 0;
9c5ffd7c 1669 I32 preeminent = 0;
a0d0e21e 1670
ae77835f 1671 if (SvTYPE(hv) == SVt_PVHV) {
8d1f198f
DM
1672 if (PL_op->op_private & OPpLVAL_INTRO) {
1673 MAGIC *mg;
1674 HV *stash;
1675 /* does the element we're localizing already exist? */
c39e6ab0 1676 preeminent =
8d1f198f
DM
1677 /* can we determine whether it exists? */
1678 ( !SvRMAGICAL(hv)
1679 || mg_find((SV*)hv, PERL_MAGIC_env)
1680 || ( (mg = mg_find((SV*)hv, PERL_MAGIC_tied))
1681 /* Try to preserve the existenceness of a tied hash
1682 * element by using EXISTS and DELETE if possible.
1683 * Fallback to FETCH and STORE otherwise */
1684 && (stash = SvSTASH(SvRV(SvTIED_obj((SV*)hv, mg))))
1685 && gv_fetchmethod_autoload(stash, "EXISTS", TRUE)
1686 && gv_fetchmethod_autoload(stash, "DELETE", TRUE)
1687 )
1688 ) ? hv_exists_ent(hv, keysv, 0) : 1;
c39e6ab0 1689
8d1f198f 1690 }
1c846c1f 1691 he = hv_fetch_ent(hv, keysv, lval && !defer, hash);
97fcbf96 1692 svp = he ? &HeVAL(he) : 0;
ae77835f 1693 }
c750a3ec 1694 else {
a0d0e21e 1695 RETPUSHUNDEF;
c750a3ec 1696 }
a0d0e21e 1697 if (lval) {
3280af22 1698 if (!svp || *svp == &PL_sv_undef) {
68dc0745
PP
1699 SV* lv;
1700 SV* key2;
2d8e6c8d 1701 if (!defer) {
ce5030a2 1702 DIE(aTHX_ PL_no_helem_sv, keysv);
2d8e6c8d 1703 }
68dc0745
PP
1704 lv = sv_newmortal();
1705 sv_upgrade(lv, SVt_PVLV);
1706 LvTYPE(lv) = 'y';
14befaf4 1707 sv_magic(lv, key2 = newSVsv(keysv), PERL_MAGIC_defelem, Nullch, 0);
68dc0745
PP
1708 SvREFCNT_dec(key2); /* sv_magic() increments refcount */
1709 LvTARG(lv) = SvREFCNT_inc(hv);
1710 LvTARGLEN(lv) = 1;
1711 PUSHs(lv);
1712 RETURN;
1713 }
533c011a 1714 if (PL_op->op_private & OPpLVAL_INTRO) {
bfcb3514 1715 if (HvNAME_get(hv) && isGV(*svp))
533c011a 1716 save_gp((GV*)*svp, !(PL_op->op_flags & OPf_SPECIAL));
1f5346dc
SC
1717 else {
1718 if (!preeminent) {
1719 STRLEN keylen;
e62f0680 1720 const char * const key = SvPV_const(keysv, keylen);
57813020 1721 SAVEDELETE(hv, savepvn(key,keylen), keylen);
bfc4de9f 1722 } else
1f5346dc
SC
1723 save_helem(hv, keysv, svp);
1724 }
5f05dabc 1725 }
533c011a
NIS
1726 else if (PL_op->op_private & OPpDEREF)
1727 vivify_ref(*svp, PL_op->op_private & OPpDEREF);
a0d0e21e 1728 }
3280af22 1729 sv = (svp ? *svp : &PL_sv_undef);
be6c24e0
GS
1730 /* This makes C<local $tied{foo} = $tied{foo}> possible.
1731 * Pushing the magical RHS on to the stack is useless, since
1732 * that magic is soon destined to be misled by the local(),
1733 * and thus the later pp_sassign() will fail to mg_get() the
1734 * old value. This should also cure problems with delayed
1735 * mg_get()s. GSAR 98-07-03 */
1736 if (!lval && SvGMAGICAL(sv))
1737 sv = sv_mortalcopy(sv);
1738 PUSHs(sv);
a0d0e21e
LW
1739 RETURN;
1740}
1741
1742PP(pp_leave)
1743{
27da23d5 1744 dVAR; dSP;
c09156bb 1745 register PERL_CONTEXT *cx;
a0d0e21e
LW
1746 SV **newsp;
1747 PMOP *newpm;
1748 I32 gimme;
1749
533c011a 1750 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1751 cx = &cxstack[cxstack_ix];
3280af22 1752 cx->blk_oldpm = PL_curpm; /* fake block should preserve $1 et al */
a0d0e21e
LW
1753 }
1754
1755 POPBLOCK(cx,newpm);
1756
533c011a 1757 gimme = OP_GIMME(PL_op, -1);
54310121
PP
1758 if (gimme == -1) {
1759 if (cxstack_ix >= 0)
1760 gimme = cxstack[cxstack_ix].blk_gimme;
1761 else
1762 gimme = G_SCALAR;
1763 }
a0d0e21e 1764
a1f49e72 1765 TAINT_NOT;
54310121
PP
1766 if (gimme == G_VOID)
1767 SP = newsp;
1768 else if (gimme == G_SCALAR) {
a3b680e6 1769 register SV **mark;
54310121 1770 MARK = newsp + 1;
09256e2f 1771 if (MARK <= SP) {
54310121
PP
1772 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1773 *MARK = TOPs;
1774 else
1775 *MARK = sv_mortalcopy(TOPs);
09256e2f 1776 } else {
54310121 1777 MEXTEND(mark,0);
3280af22 1778 *MARK = &PL_sv_undef;
a0d0e21e 1779 }
54310121 1780 SP = MARK;
a0d0e21e 1781 }
54310121 1782 else if (gimme == G_ARRAY) {
a1f49e72 1783 /* in case LEAVE wipes old return values */
a3b680e6 1784 register SV **mark;
a1f49e72
CS
1785 for (mark = newsp + 1; mark <= SP; mark++) {
1786 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP))) {
a0d0e21e 1787 *mark = sv_mortalcopy(*mark);
a1f49e72
CS
1788 TAINT_NOT; /* Each item is independent */
1789 }
1790 }
a0d0e21e 1791 }
3280af22 1792 PL_curpm = newpm; /* Don't pop $1 et al till now */
a0d0e21e
LW
1793
1794 LEAVE;
1795
1796 RETURN;
1797}
1798
1799PP(pp_iter)
1800{
39644a26 1801 dSP;
c09156bb 1802 register PERL_CONTEXT *cx;
dc09a129 1803 SV *sv, *oldsv;
4633a7c4 1804 AV* av;
1d7c1841 1805 SV **itersvp;
a0d0e21e 1806
924508f0 1807 EXTEND(SP, 1);
a0d0e21e 1808 cx = &cxstack[cxstack_ix];
6b35e009 1809 if (CxTYPE(cx) != CXt_LOOP)
cea2e8a9 1810 DIE(aTHX_ "panic: pp_iter");
a0d0e21e 1811
1d7c1841 1812 itersvp = CxITERVAR(cx);
4633a7c4 1813 av = cx->blk_loop.iterary;
89ea2908
GA
1814 if (SvTYPE(av) != SVt_PVAV) {
1815 /* iterate ($min .. $max) */
1816 if (cx->blk_loop.iterlval) {
1817 /* string increment */
1818 register SV* cur = cx->blk_loop.iterlval;
4fe3f0fa 1819 STRLEN maxlen = 0;
83003860 1820 const char *max = SvOK((SV*)av) ? SvPV_const((SV*)av, maxlen) : "";
89ea2908 1821 if (!SvNIOK(cur) && SvCUR(cur) <= maxlen) {
1d7c1841 1822 if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) {
eaa5c2d6 1823 /* safe to reuse old SV */
1d7c1841 1824 sv_setsv(*itersvp, cur);
eaa5c2d6 1825 }
1c846c1f 1826 else
eaa5c2d6
GA
1827 {
1828 /* we need a fresh SV every time so that loop body sees a
1829 * completely new SV for closures/references to work as
1830 * they used to */
dc09a129 1831 oldsv = *itersvp;
1d7c1841 1832 *itersvp = newSVsv(cur);
dc09a129 1833 SvREFCNT_dec(oldsv);
eaa5c2d6 1834 }
aa07b2f6 1835 if (strEQ(SvPVX_const(cur), max))
89ea2908
GA
1836 sv_setiv(cur, 0); /* terminate next time */
1837 else
1838 sv_inc(cur);
1839 RETPUSHYES;
1840 }
1841 RETPUSHNO;
1842 }
1843 /* integer increment */
1844 if (cx->blk_loop.iterix > cx->blk_loop.itermax)
1845 RETPUSHNO;
7f61b687 1846
3db8f154 1847 /* don't risk potential race */
1d7c1841 1848 if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) {
eaa5c2d6 1849 /* safe to reuse old SV */
1d7c1841 1850 sv_setiv(*itersvp, cx->blk_loop.iterix++);
eaa5c2d6 1851 }
1c846c1f 1852 else
eaa5c2d6
GA
1853 {
1854 /* we need a fresh SV every time so that loop body sees a
1855 * completely new SV for closures/references to work as they
1856 * used to */
dc09a129 1857 oldsv = *itersvp;
1d7c1841 1858 *itersvp = newSViv(cx->blk_loop.iterix++);
dc09a129 1859 SvREFCNT_dec(oldsv);
eaa5c2d6 1860 }
89ea2908
GA
1861 RETPUSHYES;
1862 }
1863
1864 /* iterate array */
ef3e5ea9
NC
1865 if (PL_op->op_private & OPpITER_REVERSED) {
1866 /* In reverse, use itermax as the min :-) */
c491ecac 1867 if (cx->blk_loop.iterix <= cx->blk_loop.itermax)
ef3e5ea9 1868 RETPUSHNO;
a0d0e21e 1869
ef3e5ea9
NC
1870 if (SvMAGICAL(av) || AvREIFY(av)) {
1871 SV **svp = av_fetch(av, cx->blk_loop.iterix--, FALSE);
1872 if (svp)
1873 sv = *svp;
1874 else
1875 sv = Nullsv;
1876 }
1877 else {
1878 sv = AvARRAY(av)[cx->blk_loop.iterix--];
1879 }
d42935ef
JH
1880 }
1881 else {
ef3e5ea9
NC
1882 if (cx->blk_loop.iterix >= (av == PL_curstack ? cx->blk_oldsp :
1883 AvFILL(av)))
1884 RETPUSHNO;
1885
1886 if (SvMAGICAL(av) || AvREIFY(av)) {
1887 SV **svp = av_fetch(av, ++cx->blk_loop.iterix, FALSE);
1888 if (svp)
1889 sv = *svp;
1890 else
1891 sv = Nullsv;
1892 }
1893 else {
1894 sv = AvARRAY(av)[++cx->blk_loop.iterix];
1895 }
d42935ef 1896 }
ef3e5ea9 1897
cccede53
DM
1898 if (sv && SvREFCNT(sv) == 0) {
1899 *itersvp = Nullsv;
b6c83531 1900 Perl_croak(aTHX_ "Use of freed value in iteration");
cccede53
DM
1901 }
1902
d42935ef 1903 if (sv)
a0d0e21e 1904 SvTEMP_off(sv);
a0d0e21e 1905 else
3280af22 1906 sv = &PL_sv_undef;
8b530633 1907 if (av != PL_curstack && sv == &PL_sv_undef) {
5f05dabc 1908 SV *lv = cx->blk_loop.iterlval;
71be2cbc
PP
1909 if (lv && SvREFCNT(lv) > 1) {
1910 SvREFCNT_dec(lv);
1911 lv = Nullsv;
1912 }
5f05dabc
PP
1913 if (lv)
1914 SvREFCNT_dec(LvTARG(lv));
1915 else {
68dc0745 1916 lv = cx->blk_loop.iterlval = NEWSV(26, 0);
5f05dabc 1917 sv_upgrade(lv, SVt_PVLV);
5f05dabc 1918 LvTYPE(lv) = 'y';
14befaf4 1919 sv_magic(lv, Nullsv, PERL_MAGIC_defelem, Nullch, 0);
5f05dabc
PP
1920 }
1921 LvTARG(lv) = SvREFCNT_inc(av);
1922 LvTARGOFF(lv) = cx->blk_loop.iterix;
42718184 1923 LvTARGLEN(lv) = (STRLEN)UV_MAX;
5f05dabc
PP
1924 sv = (SV*)lv;
1925 }
a0d0e21e 1926
dc09a129 1927 oldsv = *itersvp;
1d7c1841 1928 *itersvp = SvREFCNT_inc(sv);
dc09a129
DM
1929 SvREFCNT_dec(oldsv);
1930
a0d0e21e
LW
1931 RETPUSHYES;
1932}
1933
1934PP(pp_subst)
1935{
39644a26 1936 dSP; dTARG;
a0d0e21e
LW
1937 register PMOP *pm = cPMOP;
1938 PMOP *rpm = pm;
1939 register SV *dstr;
1940 register char *s;
1941 char *strend;
1942 register char *m;
5c144d81 1943 const char *c;
a0d0e21e
LW
1944 register char *d;
1945 STRLEN clen;
1946 I32 iters = 0;
1947 I32 maxiters;
1948 register I32 i;
1949 bool once;
71be2cbc 1950 bool rxtainted;
a0d0e21e 1951 char *orig;
22e551b9 1952 I32 r_flags;
aaa362c4 1953 register REGEXP *rx = PM_GETRE(pm);
a0d0e21e
LW
1954 STRLEN len;
1955 int force_on_match = 0;
3280af22 1956 I32 oldsave = PL_savestack_ix;
792b2c16 1957 STRLEN slen;
f272994b 1958 bool doutf8 = FALSE;
f8c7b90f 1959#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
1960 bool is_cow;
1961#endif
db79b45b 1962 SV *nsv = Nullsv;
a0d0e21e 1963
5cd24f17
PP
1964 /* known replacement string? */
1965 dstr = (pm->op_pmflags & PMf_CONST) ? POPs : Nullsv;
533c011a 1966 if (PL_op->op_flags & OPf_STACKED)
a0d0e21e 1967 TARG = POPs;
59f00321
RGS
1968 else if (PL_op->op_private & OPpTARGET_MY)
1969 GETTARGET;
a0d0e21e 1970 else {
54b9620d 1971 TARG = DEFSV;
a0d0e21e 1972 EXTEND(SP,1);
1c846c1f 1973 }
d9f424b2 1974
f8c7b90f 1975#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
1976 /* Awooga. Awooga. "bool" types that are actually char are dangerous,
1977 because they make integers such as 256 "false". */
1978 is_cow = SvIsCOW(TARG) ? TRUE : FALSE;
1979#else
765f542d
NC
1980 if (SvIsCOW(TARG))
1981 sv_force_normal_flags(TARG,0);
ed252734
NC
1982#endif
1983 if (
f8c7b90f 1984#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
1985 !is_cow &&
1986#endif
1987 (SvREADONLY(TARG)
4ce457a6
TP
1988 || ( (SvTYPE(TARG) == SVt_PVGV || SvTYPE(TARG) > SVt_PVLV)
1989 && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG)))))
d470f89e 1990 DIE(aTHX_ PL_no_modify);
8ec5e241
NIS
1991 PUTBACK;
1992
d5263905 1993 s = SvPV_mutable(TARG, len);
68dc0745 1994 if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV)
a0d0e21e 1995 force_on_match = 1;
b3eb6a9b 1996 rxtainted = ((pm->op_pmdynflags & PMdf_TAINTED) ||
3280af22
NIS
1997 (PL_tainted && (pm->op_pmflags & PMf_RETAINT)));
1998 if (PL_tainted)
b3eb6a9b 1999 rxtainted |= 2;
9212bbba 2000 TAINT_NOT;
a12c0f56 2001
a30b2f1f 2002 RX_MATCH_UTF8_set(rx, DO_UTF8(TARG));
d9f424b2 2003
a0d0e21e
LW
2004 force_it:
2005 if (!pm || !s)
2269b42e 2006 DIE(aTHX_ "panic: pp_subst");
a0d0e21e
LW
2007
2008 strend = s + len;
a30b2f1f 2009 slen = RX_MATCH_UTF8(rx) ? utf8_length((U8*)s, (U8*)strend) : len;
792b2c16
JH
2010 maxiters = 2 * slen + 10; /* We can match twice at each
2011 position, once with zero-length,
2012 second time with non-zero. */
a0d0e21e 2013
3280af22
NIS
2014 if (!rx->prelen && PL_curpm) {
2015 pm = PL_curpm;
aaa362c4 2016 rx = PM_GETRE(pm);
a0d0e21e 2017 }
22e551b9 2018 r_flags = (rx->nparens || SvTEMP(TARG) || PL_sawampersand)
ed252734 2019 ? REXEC_COPY_STR : 0;
f722798b 2020 if (SvSCREAM(TARG))
22e551b9 2021 r_flags |= REXEC_SCREAM;
7fba1cd6 2022
a0d0e21e 2023 orig = m = s;
f722798b 2024 if (rx->reganch & RE_USE_INTUIT) {
ee0b7718 2025 PL_bostr = orig;
f722798b
IZ
2026 s = CALLREG_INTUIT_START(aTHX_ rx, TARG, s, strend, r_flags, NULL);
2027
2028 if (!s)
2029 goto nope;
2030 /* How to do it in subst? */
2031/* if ( (rx->reganch & ROPT_CHECK_ALL)
1c846c1f 2032 && !PL_sawampersand
f722798b
IZ
2033 && ((rx->reganch & ROPT_NOSCAN)
2034 || !((rx->reganch & RE_INTUIT_TAIL)
2035 && (r_flags & REXEC_SCREAM))))
2036 goto yup;
2037*/
a0d0e21e 2038 }
71be2cbc
PP
2039
2040 /* only replace once? */
a0d0e21e 2041 once = !(rpm->op_pmflags & PMf_GLOBAL);
71be2cbc
PP
2042
2043 /* known replacement string? */
f272994b 2044 if (dstr) {
8514a05a
JH
2045 /* replacement needing upgrading? */
2046 if (DO_UTF8(TARG) && !doutf8) {
db79b45b 2047 nsv = sv_newmortal();
4a176938 2048 SvSetSV(nsv, dstr);
8514a05a
JH
2049 if (PL_encoding)
2050 sv_recode_to_utf8(nsv, PL_encoding);
2051 else
2052 sv_utf8_upgrade(nsv);
5c144d81 2053 c = SvPV_const(nsv, clen);
4a176938
JH
2054 doutf8 = TRUE;
2055 }
2056 else {
5c144d81 2057 c = SvPV_const(dstr, clen);
4a176938 2058 doutf8 = DO_UTF8(dstr);
8514a05a 2059 }
f272994b
A
2060 }
2061 else {
2062 c = Nullch;
2063 doutf8 = FALSE;
2064 }
2065
71be2cbc 2066 /* can do inplace substitution? */
ed252734 2067 if (c
f8c7b90f 2068#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2069 && !is_cow
2070#endif
2071 && (I32)clen <= rx->minlen && (once || !(r_flags & REXEC_COPY_STR))
db79b45b
JH
2072 && !(rx->reganch & ROPT_LOOKBEHIND_SEEN)
2073 && (!doutf8 || SvUTF8(TARG))) {
f722798b
IZ
2074 if (!CALLREGEXEC(aTHX_ rx, s, strend, orig, 0, TARG, NULL,
2075 r_flags | REXEC_CHECKED))
2076 {
8ec5e241 2077 SPAGAIN;
3280af22 2078 PUSHs(&PL_sv_no);
71be2cbc
PP
2079 LEAVE_SCOPE(oldsave);
2080 RETURN;
2081 }
f8c7b90f 2082#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2083 if (SvIsCOW(TARG)) {
2084 assert (!force_on_match);
2085 goto have_a_cow;
2086 }
2087#endif
71be2cbc
PP
2088 if (force_on_match) {
2089 force_on_match = 0;
2090 s = SvPV_force(TARG, len);
2091 goto force_it;
2092 }
71be2cbc 2093 d = s;
3280af22 2094 PL_curpm = pm;
71be2cbc
PP
2095 SvSCREAM_off(TARG); /* disable possible screamer */
2096 if (once) {
48c036b1 2097 rxtainted |= RX_MATCH_TAINTED(rx);
cf93c79d
IZ
2098 m = orig + rx->startp[0];
2099 d = orig + rx->endp[0];
71be2cbc
PP
2100 s = orig;
2101 if (m - s > strend - d) { /* faster to shorten from end */
2102 if (clen) {
2103 Copy(c, m, clen, char);
2104 m += clen;
a0d0e21e 2105 }
71be2cbc
PP
2106 i = strend - d;
2107 if (i > 0) {
2108 Move(d, m, i, char);
2109 m += i;
a0d0e21e 2110 }
71be2cbc
PP
2111 *m = '\0';
2112 SvCUR_set(TARG, m - s);
2113 }
155aba94 2114 else if ((i = m - s)) { /* faster from front */
71be2cbc
PP
2115 d -= clen;
2116 m = d;
2117 sv_chop(TARG, d-i);
2118 s += i;
2119 while (i--)
2120 *--d = *--s;
2121 if (clen)
2122 Copy(c, m, clen, char);
2123 }
2124 else if (clen) {
2125 d -= clen;
2126 sv_chop(TARG, d);
2127 Copy(c, d, clen, char);
2128 }
2129 else {
2130 sv_chop(TARG, d);
2131 }
48c036b1 2132 TAINT_IF(rxtainted & 1);
8ec5e241 2133 SPAGAIN;
3280af22 2134 PUSHs(&PL_sv_yes);
71be2cbc
PP
2135 }
2136 else {
71be2cbc
PP
2137 do {
2138 if (iters++ > maxiters)
cea2e8a9 2139 DIE(aTHX_ "Substitution loop");
d9f97599 2140 rxtainted |= RX_MATCH_TAINTED(rx);
cf93c79d 2141 m = rx->startp[0] + orig;
155aba94 2142 if ((i = m - s)) {
71be2cbc
PP
2143 if (s != d)
2144 Move(s, d, i, char);
2145 d += i;
a0d0e21e 2146 }
71be2cbc
PP
2147 if (clen) {
2148 Copy(c, d, clen, char);
2149 d += clen;
2150 }
cf93c79d 2151 s = rx->endp[0] + orig;
cea2e8a9 2152 } while (CALLREGEXEC(aTHX_ rx, s, strend, orig, s == m,
f722798b
IZ
2153 TARG, NULL,
2154 /* don't match same null twice */
2155 REXEC_NOT_FIRST|REXEC_IGNOREPOS));
71be2cbc
PP
2156 if (s != d) {
2157 i = strend - s;
aa07b2f6 2158 SvCUR_set(TARG, d - SvPVX_const(TARG) + i);
71be2cbc 2159 Move(s, d, i+1, char); /* include the NUL */
a0d0e21e 2160 }
48c036b1 2161 TAINT_IF(rxtainted & 1);
8ec5e241 2162 SPAGAIN;
71be2cbc 2163 PUSHs(sv_2mortal(newSViv((I32)iters)));
a0d0e21e 2164 }
80b498e0 2165 (void)SvPOK_only_UTF8(TARG);
48c036b1 2166 TAINT_IF(rxtainted);
8ec5e241
NIS
2167 if (SvSMAGICAL(TARG)) {
2168 PUTBACK;
2169 mg_set(TARG);
2170 SPAGAIN;
2171 }
9212bbba 2172 SvTAINT(TARG);
aefe6dfc
JH
2173 if (doutf8)
2174 SvUTF8_on(TARG);
71be2cbc
PP
2175 LEAVE_SCOPE(oldsave);
2176 RETURN;
a0d0e21e 2177 }
71be2cbc 2178
f722798b
IZ
2179 if (CALLREGEXEC(aTHX_ rx, s, strend, orig, 0, TARG, NULL,
2180 r_flags | REXEC_CHECKED))
2181 {
a0d0e21e
LW
2182 if (force_on_match) {
2183 force_on_match = 0;
2184 s = SvPV_force(TARG, len);
2185 goto force_it;
2186 }
f8c7b90f 2187#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2188 have_a_cow:
2189#endif
48c036b1 2190 rxtainted |= RX_MATCH_TAINTED(rx);
f2b990bf 2191 dstr = newSVpvn(m, s-m);
ffc61ed2
JH
2192 if (DO_UTF8(TARG))
2193 SvUTF8_on(dstr);
3280af22 2194 PL_curpm = pm;
a0d0e21e 2195 if (!c) {
c09156bb 2196 register PERL_CONTEXT *cx;
8ec5e241 2197 SPAGAIN;
454f1e26 2198 (void)ReREFCNT_inc(rx);
a0d0e21e
LW
2199 PUSHSUBST(cx);
2200 RETURNOP(cPMOP->op_pmreplroot);
2201 }
cf93c79d 2202 r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST;
a0d0e21e
LW
2203 do {
2204 if (iters++ > maxiters)
cea2e8a9 2205 DIE(aTHX_ "Substitution loop");
d9f97599 2206 rxtainted |= RX_MATCH_TAINTED(rx);
cf93c79d 2207 if (RX_MATCH_COPIED(rx) && rx->subbeg != orig) {
a0d0e21e
LW
2208 m = s;
2209 s = orig;
cf93c79d 2210 orig = rx->subbeg;
a0d0e21e
LW
2211 s = orig + (m - s);
2212 strend = s + (strend - m);
2213 }
cf93c79d 2214 m = rx->startp[0] + orig;
db79b45b
JH
2215 if (doutf8 && !SvUTF8(dstr))
2216 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
2217 else
2218 sv_catpvn(dstr, s, m-s);
cf93c79d 2219 s = rx->endp[0] + orig;
a0d0e21e
LW
2220 if (clen)
2221 sv_catpvn(dstr, c, clen);
2222 if (once)
2223 break;
ffc61ed2
JH
2224 } while (CALLREGEXEC(aTHX_ rx, s, strend, orig, s == m,
2225 TARG, NULL, r_flags));
db79b45b
JH
2226 if (doutf8 && !DO_UTF8(TARG))
2227 sv_catpvn_utf8_upgrade(dstr, s, strend - s, nsv);
89afcb60
A
2228 else
2229 sv_catpvn(dstr, s, strend - s);
748a9306 2230
f8c7b90f 2231#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2232 /* The match may make the string COW. If so, brilliant, because that's
2233 just saved us one malloc, copy and free - the regexp has donated
2234 the old buffer, and we malloc an entirely new one, rather than the
2235 regexp malloc()ing a buffer and copying our original, only for
2236 us to throw it away here during the substitution. */
2237 if (SvIsCOW(TARG)) {
2238 sv_force_normal_flags(TARG, SV_COW_DROP_PV);
2239 } else
2240#endif
2241 {
8bd4d4c5 2242 SvPV_free(TARG);
ed252734 2243 }
f880fe2f 2244 SvPV_set(TARG, SvPVX(dstr));
748a9306
LW
2245 SvCUR_set(TARG, SvCUR(dstr));
2246 SvLEN_set(TARG, SvLEN(dstr));
f272994b 2247 doutf8 |= DO_UTF8(dstr);
f880fe2f 2248 SvPV_set(dstr, (char*)0);
748a9306
LW
2249 sv_free(dstr);
2250
48c036b1 2251 TAINT_IF(rxtainted & 1);
f878fbec 2252 SPAGAIN;
48c036b1
GS
2253 PUSHs(sv_2mortal(newSViv((I32)iters)));
2254
a0d0e21e 2255 (void)SvPOK_only(TARG);
f272994b 2256 if (doutf8)
60aeb6fd 2257 SvUTF8_on(TARG);
48c036b1 2258 TAINT_IF(rxtainted);
a0d0e21e 2259 SvSETMAGIC(TARG);
9212bbba 2260 SvTAINT(TARG);
4633a7c4 2261 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
2262 RETURN;
2263 }
5cd24f17 2264 goto ret_no;
a0d0e21e
LW
2265
2266nope:
1c846c1f 2267ret_no:
8ec5e241 2268 SPAGAIN;
3280af22 2269 PUSHs(&PL_sv_no);
4633a7c4 2270 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
2271 RETURN;
2272}
2273
2274PP(pp_grepwhile)
2275{
27da23d5 2276 dVAR; dSP;
a0d0e21e
LW
2277
2278 if (SvTRUEx(POPs))
3280af22
NIS
2279 PL_stack_base[PL_markstack_ptr[-1]++] = PL_stack_base[*PL_markstack_ptr];
2280 ++*PL_markstack_ptr;
a0d0e21e
LW
2281 LEAVE; /* exit inner scope */
2282
2283 /* All done yet? */
3280af22 2284 if (PL_stack_base + *PL_markstack_ptr > SP) {
a0d0e21e 2285 I32 items;
54310121 2286 I32 gimme = GIMME_V;
a0d0e21e
LW
2287
2288 LEAVE; /* exit outer scope */
2289 (void)POPMARK; /* pop src */
3280af22 2290 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 2291 (void)POPMARK; /* pop dst */
3280af22 2292 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 2293 if (gimme == G_SCALAR) {
7cc47870
RGS
2294 if (PL_op->op_private & OPpGREP_LEX) {
2295 SV* sv = sv_newmortal();
2296 sv_setiv(sv, items);
2297 PUSHs(sv);
2298 }
2299 else {
2300 dTARGET;
2301 XPUSHi(items);
2302 }
a0d0e21e 2303 }
54310121
PP
2304 else if (gimme == G_ARRAY)
2305 SP += items;
a0d0e21e
LW
2306 RETURN;
2307 }
2308 else {
2309 SV *src;
2310
2311 ENTER; /* enter inner scope */
1d7c1841 2312 SAVEVPTR(PL_curpm);
a0d0e21e 2313
3280af22 2314 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 2315 SvTEMP_off(src);
59f00321
RGS
2316 if (PL_op->op_private & OPpGREP_LEX)
2317 PAD_SVl(PL_op->op_targ) = src;
2318 else
2319 DEFSV = src;
a0d0e21e
LW
2320
2321 RETURNOP(cLOGOP->op_other);
2322 }
2323}
2324
2325PP(pp_leavesub)
2326{
27da23d5 2327 dVAR; dSP;
a0d0e21e
LW
2328 SV **mark;
2329 SV **newsp;
2330 PMOP *newpm;
2331 I32 gimme;
c09156bb 2332 register PERL_CONTEXT *cx;
b0d9ce38 2333 SV *sv;
a0d0e21e
LW
2334
2335 POPBLOCK(cx,newpm);
5dd42e15 2336 cxstack_ix++; /* temporarily protect top context */
1c846c1f 2337
a1f49e72 2338 TAINT_NOT;
a0d0e21e
LW
2339 if (gimme == G_SCALAR) {
2340 MARK = newsp + 1;
a29cdaf0 2341 if (MARK <= SP) {
a8bba7fa 2342 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ
2343 if (SvTEMP(TOPs)) {
2344 *MARK = SvREFCNT_inc(TOPs);
2345 FREETMPS;
2346 sv_2mortal(*MARK);
cd06dffe
GS
2347 }
2348 else {
959e3673 2349 sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */
a29cdaf0 2350 FREETMPS;
959e3673
GS
2351 *MARK = sv_mortalcopy(sv);
2352 SvREFCNT_dec(sv);
a29cdaf0 2353 }
cd06dffe
GS
2354 }
2355 else
a29cdaf0 2356 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
cd06dffe
GS
2357 }
2358 else {
f86702cc 2359 MEXTEND(MARK, 0);
3280af22 2360 *MARK = &PL_sv_undef;
a0d0e21e
LW
2361 }
2362 SP = MARK;
2363 }
54310121 2364 else if (gimme == G_ARRAY) {
f86702cc 2365 for (MARK = newsp + 1; MARK <= SP; MARK++) {
a1f49e72 2366 if (!SvTEMP(*MARK)) {
f86702cc 2367 *MARK = sv_mortalcopy(*MARK);
a1f49e72
CS
2368 TAINT_NOT; /* Each item is independent */
2369 }
f86702cc 2370 }
a0d0e21e 2371 }
f86702cc 2372 PUTBACK;
1c846c1f 2373
5dd42e15
DM
2374 LEAVE;
2375 cxstack_ix--;
b0d9ce38 2376 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
3280af22 2377 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2378
b0d9ce38 2379 LEAVESUB(sv);
f39bc417 2380 return cx->blk_sub.retop;
a0d0e21e
LW
2381}
2382
cd06dffe
GS
2383/* This duplicates the above code because the above code must not
2384 * get any slower by more conditions */
2385PP(pp_leavesublv)
2386{
27da23d5 2387 dVAR; dSP;
cd06dffe
GS
2388 SV **mark;
2389 SV **newsp;
2390 PMOP *newpm;
2391 I32 gimme;
2392 register PERL_CONTEXT *cx;
b0d9ce38 2393 SV *sv;
cd06dffe
GS
2394
2395 POPBLOCK(cx,newpm);
5dd42e15 2396 cxstack_ix++; /* temporarily protect top context */
1c846c1f 2397
cd06dffe
GS
2398 TAINT_NOT;
2399
2400 if (cx->blk_sub.lval & OPpENTERSUB_INARGS) {
2401 /* We are an argument to a function or grep().
2402 * This kind of lvalueness was legal before lvalue
2403 * subroutines too, so be backward compatible:
2404 * cannot report errors. */
2405
2406 /* Scalar context *is* possible, on the LHS of -> only,
2407 * as in f()->meth(). But this is not an lvalue. */
2408 if (gimme == G_SCALAR)
2409 goto temporise;
2410 if (gimme == G_ARRAY) {
a8bba7fa 2411 if (!CvLVALUE(cx->blk_sub.cv))
cd06dffe
GS
2412 goto temporise_array;
2413 EXTEND_MORTAL(SP - newsp);
2414 for (mark = newsp + 1; mark <= SP; mark++) {
2415 if (SvTEMP(*mark))
2416 /* empty */ ;
2417 else if (SvFLAGS(*mark) & (SVs_PADTMP | SVf_READONLY))
2418 *mark = sv_mortalcopy(*mark);
2419 else {
2420 /* Can be a localized value subject to deletion. */
2421 PL_tmps_stack[++PL_tmps_ix] = *mark;
e1f15930 2422 (void)SvREFCNT_inc(*mark);
cd06dffe
GS
2423 }
2424 }
2425 }
2426 }
2427 else if (cx->blk_sub.lval) { /* Leave it as it is if we can. */
2428 /* Here we go for robustness, not for speed, so we change all
2429 * the refcounts so the caller gets a live guy. Cannot set
2430 * TEMP, so sv_2mortal is out of question. */
a8bba7fa 2431 if (!CvLVALUE(cx->blk_sub.cv)) {
5dd42e15
DM
2432 LEAVE;
2433 cxstack_ix--;
b0d9ce38 2434 POPSUB(cx,sv);
d470f89e 2435 PL_curpm = newpm;
b0d9ce38 2436 LEAVESUB(sv);
d470f89e
GS
2437 DIE(aTHX_ "Can't modify non-lvalue subroutine call");
2438 }
cd06dffe
GS
2439 if (gimme == G_SCALAR) {
2440 MARK = newsp + 1;
2441 EXTEND_MORTAL(1);
2442 if (MARK == SP) {
d470f89e 2443 if (SvFLAGS(TOPs) & (SVs_TEMP | SVs_PADTMP | SVf_READONLY)) {
5dd42e15
DM
2444 LEAVE;
2445 cxstack_ix--;
b0d9ce38 2446 POPSUB(cx,sv);
d470f89e 2447 PL_curpm = newpm;
b0d9ce38 2448 LEAVESUB(sv);
e9f19e3c
HS
2449 DIE(aTHX_ "Can't return %s from lvalue subroutine",
2450 SvREADONLY(TOPs) ? (TOPs == &PL_sv_undef) ? "undef"
2451 : "a readonly value" : "a temporary");
d470f89e 2452 }
cd06dffe
GS
2453 else { /* Can be a localized value
2454 * subject to deletion. */
2455 PL_tmps_stack[++PL_tmps_ix] = *mark;
e1f15930 2456 (void)SvREFCNT_inc(*mark);
cd06dffe
GS
2457 }
2458 }
d470f89e 2459 else { /* Should not happen? */
5dd42e15
DM
2460 LEAVE;
2461 cxstack_ix--;
b0d9ce38 2462 POPSUB(cx,sv);
d470f89e 2463 PL_curpm = newpm;
b0d9ce38 2464 LEAVESUB(sv);
d470f89e 2465 DIE(aTHX_ "%s returned from lvalue subroutine in scalar context",
cd06dffe 2466 (MARK > SP ? "Empty array" : "Array"));
d470f89e 2467 }
cd06dffe
GS
2468 SP = MARK;
2469 }
2470 else if (gimme == G_ARRAY) {
2471 EXTEND_MORTAL(SP - newsp);
2472 for (mark = newsp + 1; mark <= SP; mark++) {
f206cdda
AMS
2473 if (*mark != &PL_sv_undef
2474 && SvFLAGS(*mark) & (SVs_TEMP | SVs_PADTMP | SVf_READONLY)) {
d470f89e
GS
2475 /* Might be flattened array after $#array = */
2476 PUTBACK;
5dd42e15
DM
2477 LEAVE;
2478 cxstack_ix--;
b0d9ce38 2479 POPSUB(cx,sv);
d470f89e 2480 PL_curpm = newpm;
b0d9ce38 2481 LEAVESUB(sv);
f206cdda
AMS
2482 DIE(aTHX_ "Can't return a %s from lvalue subroutine",
2483 SvREADONLY(TOPs) ? "readonly value" : "temporary");
d470f89e 2484 }
cd06dffe 2485 else {
cd06dffe
GS
2486 /* Can be a localized value subject to deletion. */
2487 PL_tmps_stack[++PL_tmps_ix] = *mark;
e1f15930 2488 (void)SvREFCNT_inc(*mark);
cd06dffe
GS
2489 }
2490 }
2491 }
2492 }
2493 else {
2494 if (gimme == G_SCALAR) {
2495 temporise:
2496 MARK = newsp + 1;
2497 if (MARK <= SP) {
a8bba7fa 2498 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
cd06dffe
GS
2499 if (SvTEMP(TOPs)) {
2500 *MARK = SvREFCNT_inc(TOPs);
2501 FREETMPS;
2502 sv_2mortal(*MARK);
2503 }
2504 else {
959e3673 2505 sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */
cd06dffe 2506 FREETMPS;
959e3673
GS
2507 *MARK = sv_mortalcopy(sv);
2508 SvREFCNT_dec(sv);
cd06dffe
GS
2509 }
2510 }
2511 else
2512 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
2513 }
2514 else {
2515 MEXTEND(MARK, 0);
2516 *MARK = &PL_sv_undef;
2517 }
2518 SP = MARK;
2519 }
2520 else if (gimme == G_ARRAY) {
2521 temporise_array:
2522 for (MARK = newsp + 1; MARK <= SP; MARK++) {
2523 if (!SvTEMP(*MARK)) {
2524 *MARK = sv_mortalcopy(*MARK);
2525 TAINT_NOT; /* Each item is independent */
2526 }
2527 }
2528 }
2529 }
2530 PUTBACK;
1c846c1f 2531
5dd42e15
DM
2532 LEAVE;
2533 cxstack_ix--;
b0d9ce38 2534 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
cd06dffe
GS
2535 PL_curpm = newpm; /* ... and pop $1 et al */
2536
b0d9ce38 2537 LEAVESUB(sv);
f39bc417 2538 return cx->blk_sub.retop;
cd06dffe
GS
2539}
2540
2541
76e3520e 2542STATIC CV *
cea2e8a9 2543S_get_db_sub(pTHX_ SV **svp, CV *cv)
3de9ffa1 2544{
29c711a3 2545 SV *dbsv = GvSVn(PL_DBsub);
491527d0 2546
f398eb67 2547 save_item(dbsv);
491527d0
GS
2548 if (!PERLDB_SUB_NN) {
2549 GV *gv = CvGV(cv);
2550
491527d0 2551 if ( (CvFLAGS(cv) & (CVf_ANON | CVf_CLONED))
1c846c1f 2552 || strEQ(GvNAME(gv), "END")
491527d0
GS
2553 || ((GvCV(gv) != cv) && /* Could be imported, and old sub redefined. */
2554 !( (SvTYPE(*svp) == SVt_PVGV) && (GvCV((GV*)*svp) == cv)
2555 && (gv = (GV*)*svp) ))) {
2556 /* Use GV from the stack as a fallback. */
2557 /* GV is potentially non-unique, or contain different CV. */
c2e66d9e
GS
2558 SV *tmp = newRV((SV*)cv);
2559 sv_setsv(dbsv, tmp);
2560 SvREFCNT_dec(tmp);
491527d0
GS
2561 }
2562 else {
2563 gv_efullname3(dbsv, gv, Nullch);
2564 }
3de9ffa1
MB
2565 }
2566 else {
a9c4fd4e 2567 const int type = SvTYPE(dbsv);
f398eb67
NC
2568 if (type < SVt_PVIV && type != SVt_IV)
2569 sv_upgrade(dbsv, SVt_PVIV);
155aba94 2570 (void)SvIOK_on(dbsv);
45977657 2571 SvIV_set(dbsv, PTR2IV(cv)); /* Do it the quickest way */
3de9ffa1 2572 }
491527d0 2573
3de9ffa1 2574 if (CvXSUB(cv))
3280af22
NIS
2575 PL_curcopdb = PL_curcop;
2576 cv = GvCV(PL_DBsub);
3de9ffa1
MB
2577 return cv;
2578}
2579
a0d0e21e
LW
2580PP(pp_entersub)
2581{
27da23d5 2582 dVAR; dSP; dPOPss;
a0d0e21e
LW
2583 GV *gv;
2584 HV *stash;
2585 register CV *cv;
c09156bb 2586 register PERL_CONTEXT *cx;
5d94fbed 2587 I32 gimme;
a9c4fd4e 2588 const bool hasargs = (PL_op->op_flags & OPf_STACKED) != 0;
a0d0e21e
LW
2589
2590 if (!sv)
cea2e8a9 2591 DIE(aTHX_ "Not a CODE reference");
a0d0e21e 2592 switch (SvTYPE(sv)) {
f1025168
NC
2593 /* This is overwhelming the most common case: */
2594 case SVt_PVGV:
2595 if (!(cv = GvCVu((GV*)sv)))
2596 cv = sv_2cv(sv, &stash, &gv, FALSE);
2597 if (!cv) {
2598 ENTER;
2599 SAVETMPS;
2600 goto try_autoload;
2601 }
2602 break;
a0d0e21e
LW
2603 default:
2604 if (!SvROK(sv)) {
a9c4fd4e 2605 const char *sym;
3280af22 2606 if (sv == &PL_sv_yes) { /* unfound import, ignore */
fb73857a 2607 if (hasargs)
3280af22 2608 SP = PL_stack_base + POPMARK;
a0d0e21e 2609 RETURN;
fb73857a 2610 }
15ff848f
CS
2611 if (SvGMAGICAL(sv)) {
2612 mg_get(sv);
f5f1d18e
AMS
2613 if (SvROK(sv))
2614 goto got_rv;
aa07b2f6 2615 sym = SvPOKp(sv) ? SvPVX_const(sv) : Nullch;
15ff848f 2616 }
a9c4fd4e 2617 else {
8b6b16e7 2618 sym = SvPV_nolen_const(sv);
a9c4fd4e 2619 }
15ff848f 2620 if (!sym)
cea2e8a9 2621 DIE(aTHX_ PL_no_usym, "a subroutine");
533c011a 2622 if (PL_op->op_private & HINT_STRICT_REFS)
cea2e8a9 2623 DIE(aTHX_ PL_no_symref, sym, "a subroutine");
864dbfa3 2624 cv = get_cv(sym, TRUE);
a0d0e21e
LW
2625 break;
2626 }
f5f1d18e 2627 got_rv:
f5284f61
IZ
2628 {
2629 SV **sp = &sv; /* Used in tryAMAGICunDEREF macro. */
2630 tryAMAGICunDEREF(to_cv);
2631 }
a0d0e21e
LW
2632 cv = (CV*)SvRV(sv);
2633 if (SvTYPE(cv) == SVt_PVCV)
2634 break;
2635 /* FALL THROUGH */
2636 case SVt_PVHV:
2637 case SVt_PVAV:
cea2e8a9 2638 DIE(aTHX_ "Not a CODE reference");
f1025168 2639 /* This is the second most common case: */
a0d0e21e
LW
2640 case SVt_PVCV:
2641 cv = (CV*)sv;
2642 break;
a0d0e21e
LW
2643 }
2644
2645 ENTER;
2646 SAVETMPS;
2647
2648 retry:
a0d0e21e 2649 if (!CvROOT(cv) && !CvXSUB(cv)) {
f1025168 2650 goto fooey;
a0d0e21e
LW
2651 }
2652
54310121 2653 gimme = GIMME_V;
67caa1fe 2654 if ((PL_op->op_private & OPpENTERSUB_DB) && GvCV(PL_DBsub) && !CvNODEBUG(cv)) {
06492da6
SF
2655 if (CvASSERTION(cv) && PL_DBassertion)
2656 sv_setiv(PL_DBassertion, 1);
2657
4f01c5a5 2658 cv = get_db_sub(&sv, cv);
ccafdc96
RGS
2659 if (!cv || (!CvXSUB(cv) && !CvSTART(cv)))
2660 DIE(aTHX_ "No DB::sub routine defined");
67caa1fe 2661 }
a0d0e21e 2662
f1025168
NC
2663 if (!(CvXSUB(cv))) {
2664 /* This path taken at least 75% of the time */
a0d0e21e
LW
2665 dMARK;
2666 register I32 items = SP - MARK;
a0d0e21e 2667 AV* padlist = CvPADLIST(cv);
a0d0e21e
LW
2668 PUSHBLOCK(cx, CXt_SUB, MARK);
2669 PUSHSUB(cx);
f39bc417 2670 cx->blk_sub.retop = PL_op->op_next;
a0d0e21e 2671 CvDEPTH(cv)++;
6b35e009
GS
2672 /* XXX This would be a natural place to set C<PL_compcv = cv> so
2673 * that eval'' ops within this sub know the correct lexical space.
a3985cdc
DM
2674 * Owing the speed considerations, we choose instead to search for
2675 * the cv using find_runcv() when calling doeval().
6b35e009 2676 */
b36bdeca 2677 if (CvDEPTH(cv) >= 2) {
1d7c1841 2678 PERL_STACK_OVERFLOW_CHECK();
26019298 2679 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2680 }
9320a037
DM
2681 SAVECOMPPAD();
2682 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
6d4ff0d2 2683 if (hasargs)
6d4ff0d2
MB
2684 {
2685 AV* av;
77a005ab 2686#if 0
bf49b057 2687 DEBUG_S(PerlIO_printf(Perl_debug_log,
0f15f207 2688 "%p entersub preparing @_\n", thr));
77a005ab 2689#endif
dd2155a4 2690 av = (AV*)PAD_SVl(0);
221373f0
GS
2691 if (AvREAL(av)) {
2692 /* @_ is normally not REAL--this should only ever
2693 * happen when DB::sub() calls things that modify @_ */
2694 av_clear(av);
2695 AvREAL_off(av);
2696 AvREIFY_on(av);
2697 }
3280af22
NIS
2698 cx->blk_sub.savearray = GvAV(PL_defgv);
2699 GvAV(PL_defgv) = (AV*)SvREFCNT_inc(av);
dd2155a4 2700 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2701 cx->blk_sub.argarray = av;
a0d0e21e
LW
2702 ++MARK;
2703
2704 if (items > AvMAX(av) + 1) {
504618e9 2705 SV **ary = AvALLOC(av);
a0d0e21e
LW
2706 if (AvARRAY(av) != ary) {
2707 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
f880fe2f 2708 SvPV_set(av, (char*)ary);
a0d0e21e
LW
2709 }
2710 if (items > AvMAX(av) + 1) {
2711 AvMAX(av) = items - 1;
2712 Renew(ary,items,SV*);
2713 AvALLOC(av) = ary;
f880fe2f 2714 SvPV_set(av, (char*)ary);
a0d0e21e
LW
2715 }
2716 }
2717 Copy(MARK,AvARRAY(av),items,SV*);
93965878 2718 AvFILLp(av) = items - 1;
1c846c1f 2719
a0d0e21e
LW
2720 while (items--) {
2721 if (*MARK)
2722 SvTEMP_off(*MARK);
2723 MARK++;
2724 }
2725 }
4a925ff6
GS
2726 /* warning must come *after* we fully set up the context
2727 * stuff so that __WARN__ handlers can safely dounwind()
2728 * if they want to
2729 */
2730 if (CvDEPTH(cv) == 100 && ckWARN(WARN_RECURSION)
2731 && !(PERLDB_SUB && cv == GvCV(PL_DBsub)))
2732 sub_crush_depth(cv);
77a005ab 2733#if 0
bf49b057 2734 DEBUG_S(PerlIO_printf(Perl_debug_log,
0f15f207 2735 "%p entersub returning %p\n", thr, CvSTART(cv)));
77a005ab 2736#endif
a0d0e21e
LW
2737 RETURNOP(CvSTART(cv));
2738 }
f1025168
NC
2739 else {
2740#ifdef PERL_XSUB_OLDSTYLE
2741 if (CvOLDSTYLE(cv)) {
2742 I32 (*fp3)(int,int,int);
2743 dMARK;
2744 register I32 items = SP - MARK;
2745 /* We dont worry to copy from @_. */
2746 while (SP > mark) {
2747 SP[1] = SP[0];
2748 SP--;
2749 }
2750 PL_stack_sp = mark + 1;
2751 fp3 = (I32(*)(int,int,int))CvXSUB(cv);
2752 items = (*fp3)(CvXSUBANY(cv).any_i32,
2753 MARK - PL_stack_base + 1,
2754 items);
2755 PL_stack_sp = PL_stack_base + items;
2756 }
2757 else
2758#endif /* PERL_XSUB_OLDSTYLE */
2759 {
2760 I32 markix = TOPMARK;
2761
2762 PUTBACK;
2763
2764 if (!hasargs) {
2765 /* Need to copy @_ to stack. Alternative may be to
2766 * switch stack to @_, and copy return values
2767 * back. This would allow popping @_ in XSUB, e.g.. XXXX */
a3b680e6
AL
2768 AV * const av = GvAV(PL_defgv);
2769 const I32 items = AvFILLp(av) + 1; /* @_ is not tieable */
f1025168
NC
2770
2771 if (items) {
2772 /* Mark is at the end of the stack. */
2773 EXTEND(SP, items);
2774 Copy(AvARRAY(av), SP + 1, items, SV*);
2775 SP += items;
2776 PUTBACK ;
2777 }
2778 }
2779 /* We assume first XSUB in &DB::sub is the called one. */
2780 if (PL_curcopdb) {
2781 SAVEVPTR(PL_curcop);
2782 PL_curcop = PL_curcopdb;
2783 PL_curcopdb = NULL;
2784 }
2785 /* Do we need to open block here? XXXX */
2786 (void)(*CvXSUB(cv))(aTHX_ cv);
2787
2788 /* Enforce some sanity in scalar context. */
2789 if (gimme == G_SCALAR && ++markix != PL_stack_sp - PL_stack_base ) {
2790 if (markix > PL_stack_sp - PL_stack_base)
2791 *(PL_stack_base + markix) = &PL_sv_undef;
2792 else
2793 *(PL_stack_base + markix) = *PL_stack_sp;
2794 PL_stack_sp = PL_stack_base + markix;
2795 }
2796 }
2797 LEAVE;
2798 return NORMAL;
2799 }
2800
9d4ba2ae 2801 /*NOTREACHED*/
f1025168
NC
2802 assert (0); /* Cannot get here. */
2803 /* This is deliberately moved here as spaghetti code to keep it out of the
2804 hot path. */
2805 {
2806 GV* autogv;
2807 SV* sub_name;
2808
2809 fooey:
2810 /* anonymous or undef'd function leaves us no recourse */
2811 if (CvANON(cv) || !(gv = CvGV(cv)))
2812 DIE(aTHX_ "Undefined subroutine called");
2813
2814 /* autoloaded stub? */
2815 if (cv != GvCV(gv)) {
2816 cv = GvCV(gv);
2817 }
2818 /* should call AUTOLOAD now? */
2819 else {
2820try_autoload:
2821 if ((autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv),
2822 FALSE)))
2823 {
2824 cv = GvCV(autogv);
2825 }
2826 /* sorry */
2827 else {
2828 sub_name = sv_newmortal();
2829 gv_efullname3(sub_name, gv, Nullch);
35c1215d 2830 DIE(aTHX_ "Undefined subroutine &%"SVf" called", sub_name);
f1025168
NC
2831 }
2832 }
2833 if (!cv)
2834 DIE(aTHX_ "Not a CODE reference");
2835 goto retry;
2836 }
a0d0e21e
LW
2837}
2838
44a8e56a 2839void
864dbfa3 2840Perl_sub_crush_depth(pTHX_ CV *cv)
44a8e56a
PP
2841{
2842 if (CvANON(cv))
9014280d 2843 Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on anonymous subroutine");
44a8e56a
PP
2844 else {
2845 SV* tmpstr = sv_newmortal();
2846 gv_efullname3(tmpstr, CvGV(cv), Nullch);
35c1215d
NC
2847 Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on subroutine \"%"SVf"\"",
2848 tmpstr);
44a8e56a
PP
2849 }
2850}
2851
a0d0e21e
LW
2852PP(pp_aelem)
2853{
39644a26 2854 dSP;
a0d0e21e 2855 SV** svp;
a3b680e6 2856 SV* const elemsv = POPs;
d804643f 2857 IV elem = SvIV(elemsv);
68dc0745 2858 AV* av = (AV*)POPs;
e1ec3a88
AL
2859 const U32 lval = PL_op->op_flags & OPf_MOD || LVRET;
2860 const U32 defer = (PL_op->op_private & OPpLVAL_DEFER) && (elem > av_len(av));
be6c24e0 2861 SV *sv;
a0d0e21e 2862
e35c1634 2863 if (SvROK(elemsv) && !SvGAMAGIC(elemsv) && ckWARN(WARN_MISC))
35c1215d 2864 Perl_warner(aTHX_ packWARN(WARN_MISC), "Use of reference \"%"SVf"\" as array index", elemsv);
748a9306 2865 if (elem > 0)
3280af22 2866 elem -= PL_curcop->cop_arybase;
a0d0e21e
LW
2867 if (SvTYPE(av) != SVt_PVAV)
2868 RETPUSHUNDEF;
68dc0745 2869 svp = av_fetch(av, elem, lval && !defer);
a0d0e21e 2870 if (lval) {
2b573ace 2871#ifdef PERL_MALLOC_WRAP
2b573ace 2872 if (SvUOK(elemsv)) {
a9c4fd4e 2873 const UV uv = SvUV(elemsv);
2b573ace
JH
2874 elem = uv > IV_MAX ? IV_MAX : uv;
2875 }
2876 else if (SvNOK(elemsv))
2877 elem = (IV)SvNV(elemsv);
a3b680e6
AL
2878 if (elem > 0) {
2879 static const char oom_array_extend[] =
2880 "Out of memory during array extend"; /* Duplicated in av.c */
2b573ace 2881 MEM_WRAP_CHECK_1(elem,SV*,oom_array_extend);
a3b680e6 2882 }
2b573ace 2883#endif
3280af22 2884 if (!svp || *svp == &PL_sv_undef) {
68dc0745
PP
2885 SV* lv;
2886 if (!defer)
cea2e8a9 2887 DIE(aTHX_ PL_no_aelem, elem);
68dc0745
PP
2888 lv = sv_newmortal();
2889 sv_upgrade(lv, SVt_PVLV);
2890 LvTYPE(lv) = 'y';
14befaf4 2891 sv_magic(lv, Nullsv, PERL_MAGIC_defelem, Nullch, 0);
68dc0745
PP
2892 LvTARG(lv) = SvREFCNT_inc(av);
2893 LvTARGOFF(lv) = elem;
2894 LvTARGLEN(lv) = 1;
2895 PUSHs(lv);
2896 RETURN;
2897 }
bfc4de9f 2898 if (PL_op->op_private & OPpLVAL_INTRO)
161b7d16 2899 save_aelem(av, elem, svp);
533c011a
NIS
2900 else if (PL_op->op_private & OPpDEREF)
2901 vivify_ref(*svp, PL_op->op_private & OPpDEREF);
a0d0e21e 2902 }
3280af22 2903 sv = (svp ? *svp : &PL_sv_undef);
be6c24e0
GS
2904 if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */
2905 sv = sv_mortalcopy(sv);
2906 PUSHs(sv);
a0d0e21e
LW
2907 RETURN;
2908}
2909
02a9e968 2910void
864dbfa3 2911Perl_vivify_ref(pTHX_ SV *sv, U32 to_what)
02a9e968
CS
2912{
2913 if (SvGMAGICAL(sv))
2914 mg_get(sv);
2915 if (!SvOK(sv)) {
2916 if (SvREADONLY(sv))
cea2e8a9 2917 Perl_croak(aTHX_ PL_no_modify);
5f05dabc
PP
2918 if (SvTYPE(sv) < SVt_RV)
2919 sv_upgrade(sv, SVt_RV);
2920 else if (SvTYPE(sv) >= SVt_PV) {
8bd4d4c5 2921 SvPV_free(sv);
b162af07
SP
2922 SvLEN_set(sv, 0);
2923 SvCUR_set(sv, 0);
5f05dabc 2924 }
68dc0745 2925 switch (to_what) {
5f05dabc 2926 case OPpDEREF_SV:
b162af07 2927 SvRV_set(sv, NEWSV(355,0));
5f05dabc
PP
2928 break;
2929 case OPpDEREF_AV:
b162af07 2930 SvRV_set(sv, (SV*)newAV());
5f05dabc
PP
2931 break;
2932 case OPpDEREF_HV:
b162af07 2933 SvRV_set(sv, (SV*)newHV());
5f05dabc
PP
2934 break;
2935 }
02a9e968
CS
2936 SvROK_on(sv);
2937 SvSETMAGIC(sv);
2938 }
2939}
2940
a0d0e21e
LW
2941PP(pp_method)
2942{
39644a26 2943 dSP;
890ce7af 2944 SV* const sv = TOPs;
f5d5a27c
CS
2945
2946 if (SvROK(sv)) {
890ce7af 2947 SV* const rsv = SvRV(sv);
f5d5a27c
CS
2948 if (SvTYPE(rsv) == SVt_PVCV) {
2949 SETs(rsv);
2950 RETURN;
2951 }
2952 }
2953
2954 SETs(method_common(sv, Null(U32*)));
2955 RETURN;
2956}
2957
2958PP(pp_method_named)
2959{
39644a26 2960 dSP;
890ce7af 2961 SV* const sv = cSVOP_sv;
c158a4fd 2962 U32 hash = SvSHARED_HASH(sv);
f5d5a27c
CS
2963
2964 XPUSHs(method_common(sv, &hash));
2965 RETURN;
2966}
2967
2968STATIC SV *
2969S_method_common(pTHX_ SV* meth, U32* hashp)
2970{
a0d0e21e
LW
2971 SV* sv;
2972 SV* ob;
2973 GV* gv;
56304f61 2974 HV* stash;
f5d5a27c 2975 STRLEN namelen;
a9c4fd4e 2976 const char* packname = 0;
0dae17bd 2977 SV *packsv = Nullsv;
ac91690f 2978 STRLEN packlen;
5c144d81 2979 const char *name = SvPV_const(meth, namelen);
a0d0e21e 2980
3280af22 2981 sv = *(PL_stack_base + TOPMARK + 1);
f5d5a27c 2982
4f1b7578
SC
2983 if (!sv)
2984 Perl_croak(aTHX_ "Can't call method \"%s\" on an undefined value", name);
2985
16d20bd9 2986 if (SvGMAGICAL(sv))
af09ea45 2987 mg_get(sv);
a0d0e21e 2988 if (SvROK(sv))
16d20bd9 2989 ob = (SV*)SvRV(sv);
a0d0e21e
LW
2990 else {
2991 GV* iogv;
a0d0e21e 2992
af09ea45 2993 /* this isn't a reference */
56304f61 2994 packname = Nullch;
081fc587 2995
5c144d81 2996 if(SvOK(sv) && (packname = SvPV_const(sv, packlen))) {
b464bac0 2997 const HE* const he = hv_fetch_ent(PL_stashcache, sv, 0, 0);
081fc587 2998 if (he) {
5e6396ae 2999 stash = INT2PTR(HV*,SvIV(HeVAL(he)));
081fc587
AB
3000 goto fetch;
3001 }
3002 }
3003
a0d0e21e 3004 if (!SvOK(sv) ||
05f5af9a 3005 !(packname) ||
7a5fd60d 3006 !(iogv = gv_fetchsv(sv, FALSE, SVt_PVIO)) ||
a0d0e21e
LW
3007 !(ob=(SV*)GvIO(iogv)))
3008 {
af09ea45 3009 /* this isn't the name of a filehandle either */
1c846c1f 3010 if (!packname ||
fd400ab9 3011 ((UTF8_IS_START(*packname) && DO_UTF8(sv))
b86a2fa7 3012 ? !isIDFIRST_utf8((U8*)packname)
834a4ddd
LW
3013 : !isIDFIRST(*packname)
3014 ))
3015 {
f5d5a27c
CS
3016 Perl_croak(aTHX_ "Can't call method \"%s\" %s", name,
3017 SvOK(sv) ? "without a package or object reference"
3018 : "on an undefined value");
834a4ddd 3019 }
af09ea45
IK
3020 /* assume it's a package name */
3021 stash = gv_stashpvn(packname, packlen, FALSE);
0dae17bd
GS
3022 if (!stash)
3023 packsv = sv;
081fc587 3024 else {
5e6396ae 3025 SV* ref = newSViv(PTR2IV(stash));
7e8961ec
AB
3026 hv_store(PL_stashcache, packname, packlen, ref, 0);
3027 }
ac91690f 3028 goto fetch;
a0d0e21e 3029 }
af09ea45 3030 /* it _is_ a filehandle name -- replace with a reference */
3280af22 3031 *(PL_stack_base + TOPMARK + 1) = sv_2mortal(newRV((SV*)iogv));
a0d0e21e
LW
3032 }
3033
af09ea45 3034 /* if we got here, ob should be a reference or a glob */
f0d43078
GS
3035 if (!ob || !(SvOBJECT(ob)
3036 || (SvTYPE(ob) == SVt_PVGV && (ob = (SV*)GvIO((GV*)ob))
3037 && SvOBJECT(ob))))
3038 {
f5d5a27c
CS
3039 Perl_croak(aTHX_ "Can't call method \"%s\" on unblessed reference",
3040 name);
f0d43078 3041 }
a0d0e21e 3042
56304f61 3043 stash = SvSTASH(ob);
a0d0e21e 3044
ac91690f 3045 fetch:
af09ea45
IK
3046 /* NOTE: stash may be null, hope hv_fetch_ent and
3047 gv_fetchmethod can cope (it seems they can) */
3048
f5d5a27c
CS
3049 /* shortcut for simple names */
3050 if (hashp) {
b464bac0 3051 const HE* const he = hv_fetch_ent(stash, meth, 0, *hashp);
f5d5a27c
CS
3052 if (he) {
3053 gv = (GV*)HeVAL(he);
3054 if (isGV(gv) && GvCV(gv) &&
3055 (!GvCVGEN(gv) || GvCVGEN(gv) == PL_sub_generation))
3056 return (SV*)GvCV(gv);
3057 }
3058 }
3059
0dae17bd 3060 gv = gv_fetchmethod(stash ? stash : (HV*)packsv, name);
af09ea45 3061
56304f61 3062 if (!gv) {
af09ea45
IK
3063 /* This code tries to figure out just what went wrong with
3064 gv_fetchmethod. It therefore needs to duplicate a lot of
3065 the internals of that function. We can't move it inside
3066 Perl_gv_fetchmethod_autoload(), however, since that would
3067 cause UNIVERSAL->can("NoSuchPackage::foo") to croak, and we
3068 don't want that.
3069 */
a9c4fd4e
AL
3070 const char* leaf = name;
3071 const char* sep = Nullch;
3072 const char* p;
56304f61
CS
3073
3074 for (p = name; *p; p++) {
3075 if (*p == '\'')
3076 sep = p, leaf = p + 1;
3077 else if (*p == ':' && *(p + 1) == ':')
3078 sep = p, leaf = p + 2;
3079 }
3080 if (!sep || ((sep - name) == 5 && strnEQ(name, "SUPER", 5))) {
9b9d0b15
NC
3081 /* the method name is unqualified or starts with SUPER:: */
3082 bool need_strlen = 1;
3083 if (sep) {
3084 packname = CopSTASHPV(PL_curcop);
3085 }
3086 else if (stash) {
3087 HEK *packhek = HvNAME_HEK(stash);
3088 if (packhek) {
3089 packname = HEK_KEY(packhek);
3090 packlen = HEK_LEN(packhek);
3091 need_strlen = 0;
3092 } else {
3093 goto croak;
3094 }
3095 }
3096
3097 if (!packname) {
3098 croak:
e27ad1f2
AV
3099 Perl_croak(aTHX_
3100 "Can't use anonymous symbol table for method lookup");
9b9d0b15
NC
3101 }
3102 else if (need_strlen)
e27ad1f2 3103 packlen = strlen(packname);
9b9d0b15 3104
56304f61
CS
3105 }
3106 else {
af09ea45 3107 /* the method name is qualified */
56304f61
CS
3108 packname = name;
3109 packlen = sep - name;
3110 }
af09ea45
IK
3111
3112 /* we're relying on gv_fetchmethod not autovivifying the stash */
3113 if (gv_stashpvn(packname, packlen, FALSE)) {
c1899e02 3114 Perl_croak(aTHX_
af09ea45
IK
3115 "Can't locate object method \"%s\" via package \"%.*s\"",
3116 leaf, (int)packlen, packname);
c1899e02
GS
3117 }
3118 else {
3119 Perl_croak(aTHX_
af09ea45
IK
3120 "Can't locate object method \"%s\" via package \"%.*s\""
3121 " (perhaps you forgot to load \"%.*s\"?)",
3122 leaf, (int)packlen, packname, (int)packlen, packname);
c1899e02 3123 }
56304f61 3124 }
f5d5a27c 3125 return isGV(gv) ? (SV*)GvCV(gv) : (SV*)gv;
a0d0e21e 3126}
241d1a3b
NC
3127
3128/*
3129 * Local variables:
3130 * c-indentation-style: bsd
3131 * c-basic-offset: 4
3132 * indent-tabs-mode: t
3133 * End:
3134 *
37442d52
RGS
3135 * ex: set ts=8 sts=4 sw=4 noet:
3136 */